QK572 .V4 41 West, Villiam A further contribution to the freshwater algae of the Vest Indies. ON THE FKESIIWATER ALG^ OF THE WEST INDIES. 279 shorter and much less deeply bifid than in G. rhyncJwpJiysa. It also appears to be rather more slender than in that species. I therefore venture to contend that C. rhynchophysa of Fisch.J- Mey. & Ave-Lall. Ind. Sem. Hort. Petrop. ix. Suppl. 9, is still* a desideratum to the flora of Great Britain and Ireland. / rrt. ' journ.Linn.5oc.Bot .34 :1899. !A further Contribution to the Freshwater Algae of the West Indies. By W. West, F.L.S., and G. S. West, B.A., A.K.C.S. [Read 16th March, 1899.] The Algae included in this paper were collected mainly in the Island of Dominica by Mr. W. H. Elliott in January and Feb- ruary, 1896, and consisted of dried specimens, numbered and localized. The numbers following the localities refer to the numbered sheets at the British Museum, at which place the specimens can be consulted. In 1891 we published a short paper " On some Freshwater Algae from the West Indies " (Journ. Linn. Soc, Bot. vol. xxx.), in which 63 species were recorded from the islands of Dominica and St. Vincent, and the present paper considerably enlarges our knowledge of West Indian species of these plants. Of the 63 species mentioned in the previous paper, 21 have been found in other localities, and 66 additional ones are recorded, the latter being prefixed by an asterisk (*). One species (JRhaphidium fractuin) and two varieties (Mesotcenium Kramstai, Lemmerm., var. brevis, and Cylindrocystis tumida, F. Gay, var. domini- censis) are described as new. One alga, Lyngbya majuscula, Harv., is truly a marine species, but it was found in the collec- tion, and is therefore recorded. A number of both Desmids and Diatoms were noted from subaerial habitats a sure indication of a constantly moist atmosphere ; these occurred chiefly among patches of Scytonema, Qrchizothrix, and other filamentous algae, and often on trees. In the measurements given of the Myxophyceae in this paper, ^' crass. fil." = the diameter of the sheath containing the tri- chomes, and "crass. trich."=the diameter of the cells without . the sheath. W4I 280 MESSRS. W. AND G. S. WEST 01S T THE Class CHLOROPHYCEJE. Ord. CoNFEETiCEiE IsOGAMl. Tarn. Conpervace^. *1. Microspora abbreyiata, Lagerh. in Bericht. Deutsch. ot. Gesellsch. v. 1887, p. 417. Conferva abbreviata, ~Raben.li. Krypt. Flor. v. Sachs. 1863, p. 248 ; Flor. Furop. Algar. iii. p. 323. Hab. On roadside near Roseau Lake, Dominica (2700 ft.). No. 1160. T) *2. Microspora pachydermia, Lagerh. I. c. Conferva pachy- derma, JVille, " Om Ilvilecell. hos Conferva" Of vers, of K. Vet.- A.Jcad. Fork. 1881, no. 8, p. 20. Hah. On rocks,[Castle Bruce Eiver, Dominica (2000-3000 ft.). No. 1697. Earn. Chroolepidace^:. 3. Trentepohlia yillosa, De Toni, Syll. Algar. i. p. 239. Chroolepus villosa, Kuetz. Fhyc. gener. p. 284 ; Spec. Algar. p. 428. Crass, cell, veget. 18-22 /x. Hah. On trees in woods round Roseau Lake, Dominica. No. 1164. On trees, St. Aroment, Roseau, Dominica. No. 1254. A species was noticed on banks at Emsol, Roseau, Dominica. No. 986. The specimens were probably young forms of T. villosa. Branches few, short, and situated at long intervals along the primary filaments. Crass, fil. 18-20 p. # 4. Trentepohlia sp. Specimens very fragmentary; thickness of cells 8'5-14'5/u, 1| times longer than their diameter. llab. Roseau Valley, Dominica, on bark. No. 1344. Earn. Cladophorace^:. *5. Rhtzoclotsivm niEROGLTPiiicuM, Kuetz. Fhyc. gener. p. 205 ; Spec. Algar. p. 385 ; Stockmayer, " Ueher die Algen- FRESHWATER ALG^ OF THE WEST INDIES. 281 gattung Bhizoclonium" Verhand. zool.-hot. G-esellsch. Wien, 1593, p. 578. Yar. tortuosum, Stock m. in Verh. zool.-hot. G-eselhch. Wien, 1890, p. 583. Ehizoclonium tortuosum, Kuetz. Page. Germ. p. 205 ; Spec. Algar. p. 381. Short lateral branches entirely absent ; cell-membrane lamel- lose. Crass, fil. 25-32*5 ^ ; crass, membr. cell. 3*5-5'5 p.. , Hah. Growing in small stream, Eoseau Valley, Dominica. No. 1176. Ord. Conjugate. Fam. Zygxemace^:. *G. MOUGEOTTA Sp. Crass, cell, veget. S'Q fi. Sab. On leaves in warm stream, road to Eoseau Lake, Domi- nica (2500 ft.). No. 1178. *7. Ztgnema ERTCETORU3I, Hansq. in Archiv Naturw. Lan- desdiirchf. von B'6h?nen, Bd. vi. 1888, pp. 155-6. Zygogonium ericetorum, Kuetz. Phgc. gener. 18 13, p. 280. Crass, cell, veget. 16-22 p. Hah. On bank, road to Lake, Dominica. Xo. 1222. In stream, "Wotten Waven, Dominica. No. 121S. On ground, crater, Grande Soufriere, Dominica. Nos. 1835 and 1810. *8. Spirogtra neglecta, Kuetz. Species Algar. 1819, p. 411. Zygnema neglecta, Hass. Brit. Freshw. Alg. 1815, p. 142, t. 23. ff. 1, 2. Yar. terxata, West $ G. S. West, " Welw. Afric. Freshw. Alg." Journ. Bot. xxxv. 1897, p. 41. S. ternata, Ripart, in Bull. Soc. Bot. Fr. xxiii. 1876, p. 162. Crass, cell, veget. 44-57 p ; long, zygosp. 84-100 p ; lat zygosp. 48-54 /x. Hah. In stream, Wotten "VVaven, Dominica. No. 1248. *9. Choaspis stictica, O. Kuntze, Bevis. Gen. Plant. 1891, p. 887. Conferva stictica, Engl. Bot. Choaspis serpentaria, S. F. Gray, Arrangement Brit. PI. 1821, vol. i. p. 299 (nomen prius). Sirogonium sticticum, Kuetz. 282 messbs. w. a>:d g. s. "west on the Crass, cell, veget. 36-41 /z; long, zygosp. 90-104^; lat. zygosp. 57-61 fi. Hah. On bank at roadside, Emsol, near Eoseau, Dominica. No. 983. Gray's description of Choaspis is a very good one of the plant, and is twenty -two years previous to Kuetzing's description of Sirogonium. We think that the peculiar conjugation sufficiently separates this geuus from Spirogyra. Earn. Desmidiace^e. *10. Gonatoztgon" Ralfsii, De Bary, Conj. p. 76-7, t. 4. ff. 23-25. Long. cell. 224 f i ; lat. 125 f i. Hah. Head of Castle Bruce Eiver, Dominica. No. 1484. *11. Mesot^niitmEndlicheriaxc^i, Nag. Gattung. einz. Alg. 1849, p. 109, t. vi. b. Hah. On banks, Morne Micotrin, Dominica. No. 1109. *12. M. Kramstat, Lemmermann, " Zur AJgenfl. des Riesen- gebirges" Forschungsberichte aus der Biol. Stat, zn Plon. iv. 1896, pp. 115-117, c. fig. Var. brevis, var. nov. Yar. cellulis angustioribus brevioribusque. Long. 25-34-5 ^ ; lat. 6-5-7 fi. Hah. On bank, Morne Micotrin, Dominica. No. 1109. 13. M. hicrococcum, Kirchn. Alg. Seliles. p. 134. Palmogloea micrococca, Kuclz. Tab. p/igcolog. i. p. 20, t. 25. f. 5. Long. 17-18 fi ; lat. 8-8'5 fi. Bab. On bank, road to Lake, Dominica (2700 ft.). No. 1222. *14. Cylindrocystis tumida, F. Gay, ' Essai monogr. loc. Conj.,' Montpellier, L884, p. 52, t. 1. f. 1 ; " JSote Conj. du midi France" Bull. iSoc. bot. Fr. vol. xxxi. p. 334. Var. bominicensis, var. nov. Var. cellulis multe minoribus, diametro 2-2]-plo longioribus, ad medium leviter soil distincte constrictis. Long. 425-48 /u ; lat. 20-21 p. Hub. On rocke, Castle Bruce Eiver (2000-3000 ft.), Domiuica. No. 1697. FRESHWATER ALGLE OF THE WEST INDIES. 283 *15. Pe^ium curtuac, Breb. in Kuetz. Species Algar. 1849, p. 167. Closterium curtum, Breb. 1810. Cosrnarium curtum, Balfs, Brit. Desm. p. 109, t. 32. f. 9. Hob. With the preceding species. *16. P. didymocarpum, Lund., " Desm. Saec."Act. Beg. Soc. Sclent. Upsal. 1870, p. 85, t. 5. f. 9. Forma cellulis latioribus ; long. 29 p ; lat. 17 p. Hab. On banks. Morne Micotrin, Dominica. No. 110.9. This form is somewhat similar to the " Benlum sp. ? mit Benium dldgmocarpum Lundell verwandt " figured by Heimerl in Verhandl. zool.-botan. G-esellsch. AVien, 1891, t. 5. f. 5, but is comparatively a little broader. *17. P. Navicula, Breb. in Mem. Soc. Sc. Nat. Cherbourg, vol. iv. 1856, p. 116, t. 2. f. 37. Long. 30 /z; lat. 11*5 /i. Hab. Among Trentepolilui villosa, De Toni, on trees in woods round Roseau Lake, Domiuha. No. 1161. 18. Tetmeaiorus l^vis, Balfs, Brit. Desm, p. 117, t. 21. f. 2. Hab. On banks, Morne Micotrin, Dominica. No. 1109. *19. T. granulatus, Balfs in Ann. 4' Mag. Nat. Hist. vol. xiv. 1811, p. 257, t. 8. f. 2 ; Brit. Desm. p. 117, t. 21. f. 2, t. 33. f. 1. Forma minor, Nordst. Alg. Sandvic. p. 10. Long. 100 p ; lat. 26'5 p. Hab. On roadside near Roseau Lake (2700 ft.), Dominica. No. 1160. 20. Cosmariuai pseudopvramidatuai, Lund., " Desm. Suec." Act. Beg. Soc. Sclent. Upsal. 1870, p. 41, t. 2. f. 18. Hab. On banks, Morne Micotrin, Dominica. No. 1109. On bank near Roseau Lake (2700 ft.), Dominica. No. 1180. A proportionately longer form was noticed : long. 57 p ; lat. 28 p ; lat. isthm. 12 p. 21. C. quadratitai, Balfs in Ann. <$f Mag. Nat. Hist. voL xiv. 1844, p. 395, t. 11. f. 9. A small form : long. 46 p. ; lat. 26*5 p ; lat. isthm. 12 p. LIKN". JOTTRX. BOTAJST, VOL. XXXIV. X 284 MESSES. W. AND G. S. WEST ON THE Hab. In warm stream, road to Roseau Lake (2500 ft.), Dominica. No. 1177. *22. Cosmaeitjm eectangulake, Grun. in Babenh. Mor. Burop. Algar. iii. p. 166. C. gotlandicum, Wittr. in Bih. till K. Sv. Vet.-Akad. Handl. Bd. i. no. 1, p. 60, t. 4. f. 14. A form somewhat approaching Yar. africanum, West & G. S. "West ("Algae from Central Africa/' Journ. Bot. xxxiv. 1896, p. 379, t. 361. f. 14). Long. 31 fx ; lat. 23 /j. ; lat. isthm. 10 ft. Hab. On banks, Morne Micotrin, Dominica. No. 1109. 23. C. OBLiQTJini, Nordst., " Norges Desmid." Acta Univ. Lund, vol. ix. p. 23, t. 1. f. 8. Long. 19-22 li ; lat. 165-17 li ; lat. isthm. 6*5-8 /j ; crass. 9-5^. Hab. On banks, Morne Micotrin, Dominica. No. 1109. On rocks, Castle Bruce River (2000-3000 ft.), Dominica. No. 1697. *24. C. LiF.TE, Babenh. Flor. Furop. Algar. iii. p. 161 ; Kordst. in Of vers, af K. Vet.-Akad. Fork. 1876, no. 6, p. 29, t. 12. f. 4. Long. 30 ^ ; lat. 19 p ; lat. isthm. 7 ll. Hab. On leaves, Wotten Waven, Domiuica. No. 1240. *25. C. annulatfm, De Bary, Con}, p. 46. Dvsphinetiuin annulatuin, Nag. Gattung. einz. Alg. p. 110. t. 6 r. Var. elegans, Nordst., " Norges Desmid." Acta Univ. Lund, vol. ix. p. 23. Long. 36-39 ll lat. 19-21 /<. Hab. On rocks, Castle Bruce River (2000-3000 ft.), Dominica. N . 1697. *26. Htalotheca dissiliens, Breb. in Balfs, Brit. Desm. p. 51, t. 1. . 1. Lat. 17 li. Hab. On leaves in warm stream, road to Roseau Lake (2500 ft.), Dominica. No. 1178. Ord. Pkotococcoidej. Fam. Palmellaceje. *27. RiiAr-HiDiUM ehactum, sp. n. Ji. (.rilulis semper singulis, gregariis,lcviter curvatis. diamctro FRESHWATER ALG^ OF THE WEST IXDIES. 285 7-10-plo longioribus, apices versus plus incurvatis, apicibus acutis ; conteutuni chlorophyllosum cellularuni viride, in partibus subsequalibus quatuor distincte divisum. Long. 19-36-5^; lat. 2-6-3-4 p. Sab. In stream, Wotten "Waven, Dominica. No. 1249. This species is nearest to Rhaphiclium Braunii, Nag. (in Kuetz Spec. Algar. p. 891 ; Kabenh. Elor. Europ. Algar. iii. p. 45), but the form of the cells, which are narrower, and the peculiar division of the contents easily distinguish it. Some specimens were noticed in which the contents were divided into 3 or 5 parts, but these were abnormal and very scarce. *28. Ooctstis solitaria, Wlttr. in Wittr. 8f Nordst. Alg. Exsic. no. 244. Sab. On trees in woods round Roseau Lake, Dominica. No. 1164. *29. Gtlceoctstts gigas, Lagerh. in Of vers, of K. Vet.-Akad. Fork. 1883, no. 2, p. 63. Protococcus gigas, Kuetz. Phyc. Germ. 1S45, p. 145. Chlorococcum gigas, Grun. Hal. With the preceding species. *30. Trochiscia aspera, Hansg. in Sedwigia, 1888, Heft 5 u. 6. Acanthococcus aspera, Beinsch, in Berichte der Deutsch. lot. Gesellsch. in Berlin, 18S6, p. 239, t. ll.Jf. 2. Diam. cell. 15-17*5 /i. Hah. In stream, Wotten Waven, Dominica. No. 1249. Class MYXOPHYCE.E. Ord. Hormogone^:. Sub-ord. Heterocxstej. Earn. Rivttlariace^:. *31. Calothrix epiphttica, West 4' & S. West, " Welw. Afric. Freshiv. Alg." Jonrn. Bot. xxxv. 1897, p. 240. Rob. Epiphytic on Tolypothrix byssoidea, on leaves, Wotten Waven, Dominica. No. 1210. i2 286 MESSES. YV. AND G. S. WEST ON THE Earn. Sieosiphoniace^;. 32. Hap alo siphon intbicatus, JFes^, " Alg. from West Indies" Journ. Linn, Soc, JBot. vol. xxx. (1894) p. 271-2, t. 15. ff. 16-28 ; West Sf G. S. West, " Welw. Afric. Freshw. Alg.," Journ. Bot. xxxv. L897, p. 242. Hab. In stream, Wotten Waven, Dominica. No. 1249. 33. Stigonema hobmoides, Born, et Flah., " Bevis. de Nostoc. Heterocyst." Ann. Set. Nat. 7 e serie, Bot. vol. v. (1887) p. 69. Scytonema hormoides, Kuetz. Sirosiphon brevis, Kuetz. in Bot. Zeit. 1847, p. 196 ; Tab. Bliyc. ii. p. 10, t. 34. f. ii. Sirosiphon hormoides, Kuetz. Spec. Algar. p. 316 ; Tab. Phyc. ii. p. 10, t. 34. f. iv. Crass, fil. 10-14*5 /x. Hab. Abundant on banks, Morne Micotrin, Dominica. No. 1109. On roadside and on bank, near Eoseau Lake (2700 ft.), Dominica. Nos. 1160 and 1180. On rocks, Castle Bruce Eiver, (2000-3000 ft.), Dominica. No. 1697. 34. S. minutum, Hass. Brit. Freshw. Alg. i. p. 230, t. 67. ff. 3-4 ; Born, et Flah. I. c. pp. 72-74. Hab. In stream, Wotten Waven, Dominica. No. 1249. *35. S. ocellattjm, Thur. in Ann. Sc. Nat. 6 e ser. Bot. i. (1875) p. 380. Sirosiphon ocellatus, Kuetz. Spec. Algar. p. 317 ; Tab. Bhijc. ii. p. 11, t. 37. f. ii. Hab. On rocks, Castle Bruce Eiver (2C00-3000 ft.), Dominica. No. 1697. Earn. Scytonemace-E. 36. Miceoch^ta tentjissima, West, "Alg. West Ind.," Journ. Linn. Soc, Bot. vol. xsx. (1894) p. 269. Hah. "With the preceding species. 37. Scytonema ambiguum, Kuetz. Spec. Algar. p. 894 ; Tab. Bhyc. ii. p. 7, t. 26. f. ii. Crass, fil. 10'5/x; crass, tricli. 27-3 /z. Hab. On bank near summit, Couliabon (3700 ft.), Dominica. No. 1899. FEESHWATEE ALGiE OF TITE WEST INDIES. 287 *38. Scytonema Hofaianni, Aqctrdh, Syn. Algar. Scand. 18 17, p. 117 ; Born, et Flah., " Bevis. des Nostoc. Heterocyst." Ann. des Sci. Nat. 7 e ser. Bot. vol. v. (1887) p. 97. Scytonema Julianum, Meneyh. The filaments, which were not incrusted with lime, were strongly agglutinated together in vertical tufts about 2 to 4 mm. high, in the manner of a Symploca or some species of Schizothrioc. The sheath was perfectly colourless and very thin ; the branches were very scarce and sometimes single. The cells were more often longer than broad, and varied from subquadrate to twice longer than their diameter. Crass, fil. 9 - 5-105 \x ; crass, trich. 7-7*5 jx. Hab. Head of Castle Bruce River, Dominica. No. 1484. 39. S. amplt/m, West, " Alg. West Indies" Journ. Linn. Soc, Bot. vol. xxx. (1894) p. 270. Rah. On rocks, Castle Bruce Kiver (2000-3000 ft.), Dominica. 3STo. 1697. 40. S. mieabile. Conferva mirabilis, Dillw. Scytonema figuratum, Agardk, Syst. Algar. p. 38. S. calotrichoides, Kuetz. Spec. Alyar. p. 307 ; Tab. Bliyc. ii. p. 6, t. 22. f. ii. ; Babenh. Flor. Furop. Alyar. ii. p. 253. Crass, fil. 20-23 fx ; crass, trich. 7*5-9*5 /u. Sab. On rocks, Hampstead Valley (850 ft.), Dominica. No. 2171. *41. Toltpotheix btssoidea, West Sf Gr. S. West, " Welw. Afric. Freshiv. Alg., v Journ. Bot. xxxv. 1897, p. 267. Hassallia byssoidea, Rass. Brit. Freshw. Alg. i. p. 233-4 ; ii. t. 67. f. 5 ; Born, et Flah., " Bevis. des Nostoc. Reterocyst." Ann. Sci. Nat. T ser. vol. v. (1887) p. 116. Crass, fil. 16*5-18 ii ; crass, trich. 10*5-12*5 /jl. Hob. On leaves, AVotten Waven, Dominica. No. 1240. Although the form seen occurred on the leaves of trees, it -agreed with the f. saxicola, Grrunow (in Born, et Flah. I. c. p. 117) and not with the f. lignicola, Born, et Flah. The sheaths of the younger filaments were almost colourless, and those of the older filaments were somewhat rough on the exterior. The cells in some of the filaments were almost as long as broad. 288 messes, w. and g. s. west on the Fam. Nostoceje. *42. Nostoc mdscoettm, Agardh, Disjpos. Algar. Suec. 1S12, p. 44; CooJce, Brit. Freshw. Alg. p. 230, t. 90. ff. 12-18. The specimens approached var. tenaoc, Thuret, in the thickness of the trichomes and in the small size of the spores. Crass, trich. 3-35 fx ; crass, heterocyst. 5*5 fi; crass, spor. 6-7-5 li. Hab. Growing on sides of road, Fort Charlotte, St. Vincent. No. 203. 43. N. HTJMirtrsTJM, Carm. ex Harvey in Sm. Engl. Flora, 1833, v. p. 399 ; Kuetz. Spec. Algar. p. 301 j Babenli. Flor. Eurojj. Algar. ii. p. 183. Hob. In stream, "Wotten AVaven, Dominica. No. 1249. Sub-Ord. HoMOCYSTEiE. Earn. Vaginaeiej;. *44. Poephyeosiphon NotaeisiIj/iw^.?. Tab. Flujc. ii. 1S50-2, p. 7, t. 27. f. i. ; West Sf G. S. West, " Welw. Ajric. Freshw. Alg." Joitrn. Bot. xxxv. 1897, p. 271. Crass, fil. 20-23 fx ; crass, trich. 14 fi. Bab. On the sides of road, Fort Charlotte, St. Vincent. No. 203. 45. ScnizoTHEix cuspidata, West ty G. S. West in Journ. Boy. Micr. Soc. 189G, p. 104. Symploca cuspidal a. J Test, u Alg. West Ind." Journ. Linn. >Soc., Bot. vol. xxx. (1894) p. 273, t. 16. if. 1-7. A'ar. luteo-fusca, West <$f G. S. West. Symploca cuspidata var. luteo-fusca, West, I. c. (1894) p. 274. Ilab. On banks, Morne Micotrin, Dominica. No. 1109. On roadside near Roseau Lake (2700 ft.), Dominica. No. 11G0. On bank near summit, Couliabon (3700 ft.), Dominica. No. 1899. Fam. Lyngbye.f. *46. Lyngbya majuscula, llarv. in Snu Engl. FI. 1833, y. p. 370 ; Gomont, Monogr. des Oscillarices, pp. 151-6, t. 3. ff. 3-4. FRESHWATER ALGiE OF THE WEST INDIES. 289 Crass, fil. 40-16 fx ; crass, trich. 34-38 fj. Hab. Shallow bays, Anguilla. No. 20. *47. Lyngbya ^ruglneo-c^rulea, Gomont, Monogr. des Os- cillariees, p. 166, t. 4. ff. 1-3. Oscillaria rerugineo-cserulea, Kuetz. Phyc. gener. p. 185 ; Tab. Phyc. i. p. 28, t. 39. f, ix. Crass, trich. 4-5'5 /j.. Hab. On leaves in warm stream, road to Roseau Lake (2500 f r.), Domiiiica. No. 1178. On gro und (2000-3000 ft.), and in stream, crater of Grrande Soufriere, Dominica. N os. 1832 and 1842. *48. Phormimum luridum:, Gomont, I. c. p. 185-6, t. 4. ff. 17-18. Leptothrix lurida, Kuetz. Crass, trich. 2 p. Hab. Growing on sides of road, Fort Charlotte, St. Yincent. *49. P. fragile, Gomont, I. c. p. 183-4, t. 4. ff. 13-15. Anabaena fragilis, Menegh. Crass, trich. 1'7/z. Hab. In stream, Wotten "VVaven, Dominica. No, 1249. Ord. Chhoococcacei'. *50. GrLOZociPSA gelatinosa, Kuetz. Phyc. gener. p. 174; Tab. Phyc. i. t. 20. f. vi. b ; Babenh. Flor. Europ. Algar. ii. p. 39. Diam. cell. 25-3 n ; diam. fam. 7*5-19 ju. Hab. On banks, Morne Micotrin, Dominica. No. 1109. Class BACILLARIE.E. Ord. Eaphidie^. Fam. Cymbelle^. *51. Cymbella Cistttla, Kirchn. Cocconema Cistula, Hempr. 1828 ; Van Heurck, Diatom. (Engl, transl.) p. 149, t. 1. f. 45. Hab. On rocks, Castle Bruce Biver (2000-3000'ft.), Dominica. No. 1697. *52. Encyonema. VENTRicosrM, Kuetz. Bacill. p. 80, t. 6. f. 16. Cymbella ventricosa, Agardh. Hab. "With the preceding species. 290 MESSES. W. AND G. S. WEST ON THE Earn. Navicttleje. *53. Nayicttla ma joe, Kuetz. Bacill. t. 4. f. 19. Pinnularia major, Babenh. Siissiv. Diatom, p. 42, t. 6. f. 5; Flor. Europ. Algar. i. p. 210. Sab. On bank near Roseau Lake (2700 ft.), Dominica. No. 1180. In stream, Wotten Waven, Dominica. Nos. 1248 and 1249. *54. N. vieidis, Kuetz. Bacill. t. 4. f. 18. Pinnularia viridis, Bahenli. Sussw. Diatom, p. 42, t. 6. f. 4; JF/or. Europ. Algar. i. p. 212. Hah. On bank near Roseau Lake (2700 ft.), Dominica. No. 1180. In stream, Wotten Waven, Dominica. No. 1248. 55. N. bobealis. Kuetz. Pinnularia borealis, Ehrenb. ; TV. 8m. Brit. Diat. ii. p. 94 ; Babenh. Flor. Europ. Alg. i. p. 216. Sab. Among JVostoc muscorum, Agardh, on side of road, Port Charlotte, St. Vincent. No. 203. On banks, Emsol, near Roseau, Dominica. No. 983. *56. N. Hilseana, Janiscli in SeJnm'Jf, Atlas Diatom, p. 45, f. 65 ; Van Seurck, Diatom. (Engl, transl.) p. 171, t. 2. f. 81. Sab. Among Lyngbya cerugineo-ccerulea :, Gomont, on ground, crater of Grande Soufriere (2000-3000 ft.), Dominica, No. 1832. *57. N. sttbcapitata, Greg, in Quart. Journ. Micr. Sci. 1856' p. 9, t. i. f . 30 ; Van Seurck, Diatom. (Engl, transl.) p. 173, t. 2. f. 91. Sab. In small stream, Roseau Valley, Dominica. No. 1176. *58. N. appendiculata, Kuetz. Bacill. p. 93, t. 3. f. 18 ; Van Seurch, I. c. p. 173, t. 2. f. 93. Sab. On ground, crater of Grande Soufriere (2000-3000 ft.), Dominica. No. 1832. *59. N. globtoeps, Greg, in Quart. Journ. ILicr. Sci. 1856, p. 10, t. i. f. 34 ; Van Beurclc, I. c. p. 173, t. 2. f. 94. llab. On bank near Roseau Lake (2700 t\.), Dominica. No. 11 SO. *60. N. Legumes, EJtrcnb.: Van Seurel, I.e. p. 174, t. 2. f. 98. TKESHWATER ALGJE OF THE WEST INDIES. 291 Hah. In small stream, Eoseau Valley, Dominica. No. 1176. In stream, Wotten Waven, Dominica. No. 1248. *61. Navicula gracilis, Kuetz. Bacill. p. 91, t. 3. f. 48; Van Heurck, I. c. p. 179, t. 3. f . 109. Hah. On bank at roadside, Emsol, near Eoseau, Dominica. No. 983. 62. N. cryptocephala, Kuetz. ; TV. Sm. Brit. Dial. p. 53, t. 17. . 155. Hah. In warm stream, road to Eoseau Lake (2500 ft.), Dominica. No. 1177. In stream, Wotten Waven, Dominica. No. 1248. *63. N. elliptica, Kuetz. Bacill. p. 98, t. 30. f. 55 ; Van Heurck, I. c. p. 20 L, t. 4. f. 156. Hah. On leaves of trees and in stream, Wotten "Waven, Dominica. Nos. 1240 and 1249. *64. N. coxtenta, Grun. in Van Heurck, Atlas, t. 14. f. 31*, sub. n. N. trinodis ; Van Heurck, Diatom. (Engl, transl.) p. 230, t. 5. f. 239. Var. biceps, Van Heurck, I. c. p. 230, t. 5. f. 240. Hah. On leaves of trees, Wotten Waven, Dominica: very abundant. No. 1240. Also scarce in stream, Wotten Waven, Dominica. No. 1249. 65. Vanthettrceja rhomboides, Breh.; Van Heurck, Diatom. (Engl, transl.) p. 240, t. 5. f. 249. Erustulia rkomboides, De Toni, Sylloge Algar. h. p. 227. Navicula rhomboides, Ehrenh.; W. Sm. Brit. Diat. i. p. 46, t. 16. f. 129. Hah. On bank, near Eoseau Lake (2700 ft.), Dominica. No. 1180. In stream, Wotten Waven, Dominica. Nos. 1248 and 1249. Var. saxonica. Erustulia saxonica, Baienh. Navicula crassi- nervia, Breh. in TV. Sm. Brit. Diat. i. p. 47, t. 31. f. 271. Hah. On banks, Morne Micotrin, Dominica. No. 1109. On roadside near Eoseau Lake (2700 ft.), Dominica. No. 1160. On leaves in warm stream and on bank, road to Eoseau Lake (2500-2700 ft.), Dominica. Nos. 1178 and 1222. Head of Castle Bruce Eiver, Dominica. No. 1484. 292 MESSES. W. AND G. S. WEST ON THE *6G. Vanbeukckia vulgaris, Van HeurcJc, Diatom. (Engl, transl.) p. 240, t. 5. f. 252. Colletonema vulgaris, Thivaites. Sab. In small stream, Eoseau Valley, Dominica. No. 1176. In stream, Wotten Waven, Dominica. Nos. 1248 and 1249. Eam. GrOMPHONEME-E. *67. Gohphonema gbactle, Ehrenb. ; Van Heurck, 7. c. p. 272, t. 7. f. 309. Var. dichotomtth, Van HeurcJc, I. c. p. 273, t. 7. f. 310. G. dicbotomum, TV. Sm. Hab. In warm stream, road to Eoseau Lake (2500 ft.), Dominica. No. 1177. # 68. G. axgustatum, Kuetz. Bacill. p. 83, t. 8. . 4. Hab. In warm stream, road to Eoseau Lake (2500 ft.), Dominica. No. 1177. In stream, "Wotten Waven, Dominica. No. 1248. *69. G. OLTYACEUM, Kuetz. I. c. p. 85, t. 7. ff. 13, 15. Hab. In small stream, Eoseau Valley, Dominica. No. 1176. 70. G. tekelltjm, Kuetz. ; TV. 8m. Brit. Biat. i. p. 80, t. 29. f. 243. Hab. In stream, Wotten Waven, Dominica. No. 1249. Earn. Acilsantiiej:. 71. Acitnantiies linearis, Grun. Aclmanthidium lineare, TV. 8m. Brit. Biat. ii. p. 31, t. 61. f. 381. Hab. On banks, Emsol, Eoseau, Dominica. No. 986. In small stream, Eoseau Valley, Dominica. No. 1176. *72. A. lanceolata, Grun. Aclmanthidium lanceoiatum, Brih. in Kuetz. Spec. Alcjar. p. 54. Hab. Among Kostov wi'scorum, Agardh, on sides of road, Eort Charlotte, St. Vincent. No. 203. On leaves of trees, Wotten Waven, Dominica. No. 1240. Earn. Cocconeideje. *73. Cocconets Pediculus, Ehrenb. ; Kuetz. Bacill. t. 5. f. ix. 1 ; W. 8m. Brit. Diat. i. p. 21, t. 3. f. 31. Hah. Attached to Lynybya ?najuscula, llarv., in shallow bays, knguilla. No. 20. FRESHWATER ALGJE OF THE WEST INDIES. 293 Ord. Psetjdo-eaphidiej;. Fam. Epithemie^e. *74. Epithemia gibberfla, Kuetz. Bacill. t. 30. f. 3*; Van Heurck, Diatom. (Engl, transl.) p. 297, t. 30. f. 825. Hab. On sides of road, Port Charlotte, St. Vincent. Xo. 203. In warm stream, road to Roseau Lake (2500 ft.), Dominica. Nos. 1177 and 1178. On bank, road to Lake, Dominica. No. 1222. Head of Castle Bruce River, Dominica. Xo. 1481. On rocks, Hampstead Valley, Dominica (850 ft.). Xo. 2171. 75. Eunotia gracilis, Babenh. Flor. Europ. Alrjar. i. p. 72. Himantidium gracile, Ehrenb. ; W. Sm. Brit. Diat. ii. p. 14, t. 33. f. 285. Hab. On banks, Morne Micotrin, Dominica. Xo. 1109. On roadside, on bank and on trees in woods round Roseau Lake, Dominica (2700 ft.). Xos. 1160, 1101, and 11(34. On leaves in warm stream, road to Roseau Lake (2500 ft.), Dominica. Xo. 1178. On rocks, Castle Bruce River, Dominica. Xo. 1697. On rocks, Hampstead Valley, Dominica. Xo. 21.71. *76. E. pectixalis, Babenh. Flor. Europ. Algar. i. p. 73. Himantidium pectinale, Kuetz. Bacill. t. 16. f. 2. Hab. In warm stream, road to Roseau Lake (2500 ft.), Dominica. Xo. 1177. On ground, crater of Grande Soufriere (2000-3000 ft.), Dominica. Xo. 1835. *77. E. veneris, Kuetz. Bacill. p. 40, t. 30. f. 7. E. incisa, Greg. Hab. In warm stream, road to Roseau Lake (2500 ft.), Dominica. Xos. 1177 and 1178. *78. E. lunaris, Grun. Synedra lunaris, Ehrenb. ; W. Sm. Brit. Diat. i. p. 69, t. 11. f. 82. Hab. On leaves in warm stream, road to Roseau Lake (2500ft.), Dominica. Xo. 1178. On ground, crater of Grande ISoutriere, Dominica (2000-3000 ft.). Xo. 1835. 29i FRESHWATER ALQM OE THE WEST INDIES. Earn. Synedre^:. *79. Stnedra pulchella, Kuetz. Bacill. p. 68, t. 29. f. 87. Hah. In small stream, Roseau Valley, Dominica. No. 1176. In stream, Wotten Waven, Dominica. No. 1219. *80. S. radians, Grun. ; Van Heurck, Diatom. (Engl, transl.) p. 312, t. 10. f. 423. Hal. In stream, "Wotten Waven, Dominica. No. 1219. Earn. Diatome^;. *81. Denticela tenuis, Kuetz. Bacill. t. 18. f. 8. Yar. INFLATA, Van Heurck, Diatom. (Engl, transl.) p. 352, t. 11. f. 462. D. inflata, W. 8m. Hah. In small stream, Eoseau Valley, Dominica. No. 1176. Head of Castle Bruce River, Dominica. No. 14S4. Earn. NiTzscniEiE. 82. Nitzschia dissipata, Grun. ; Van Heurck, Diatom. (Engl, transl.) p. 391, t. 16. f. 525. (? N. minutissima, W. 8m. Brit. Diat. p. 41, t. 13. f. 107.) Hah. On Leaves in warm stream, road to Eoseau Lake, Dominica (2500 ft.). No. 1178. On leaves, "Wotten Waven, Dominica. No. L240. On ground, crater of Grande Soufriere (2000-3000 it.), Dominica. No. 1S32. *83. N. obtusa, TV. 8m. Brit. Diet. i. p. 39, t. 13. f. 109. Yar. nana, Grun. ; Van Heurck, Diatom. (Engl, transl.) ]>. 39S, t. 1(5. f. 539. Jlnh. On bank, at roadside, Emsol, near Eoseau, Dominica. No. 9S3. 84. N. lineabis, IV 8m. Brit. Diat. i. p. 39, t. 13. f. 110. Hah. In small Btream, Roseau Valley, Dominica. No. 117(5. Var. tenuis, Grun. X. tennis, W. Sm. Huh. On ground, crater of Grande Soufriere (2000-3000 ft.), Dominica. Nob. 1832 and 1835. 85. N". COMMTJKIS, Bdbenh. ; Flor. Europ. AL/ar. i. p. 159. Hah. Among Nbstoc muscorum, Agardh, on sides of road, Fort Charlotte, St. Vincent No. 203. On bank, at roadside, Emsol, near Roseau, Dominica. No. 983. . t . ; : : rd. 8 b*. : . )i . . ii. p. 7 , t. 51. f , * rv ( ft.), . . 1177. 3icU, . , iat . 1. tr 1. ) p. , jolu in str b, : to Roseau 1 00 ft. . - t . .11 1177. his is h: 1 st of t rinc New York Botanical Garden Library QK572.W4 W41 West, William/A 3 5 ge further contribution to 85 00115 9209