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 



