234 MESSRS. W. AND G. 8. WEST ON THE 
Hab. In warm stream, road to Roseau Lake (2500 ft.), 
Dominica. No. 1177. 
*99. CosMARIUM RECTANGULARE, Grun. in Rabenh. Flor. 
Europ. Algar. iii. p. 166.—C. gotlandieum, Wittr. in Bih. till K. 
Sv. Vet.-Akad. Handl. Bd. i. no. 1, p. 60, t. 4. f. 14. 
A form somewhat approaching var. africanum, West & G. 8. 
West (* Alge from Central Africa,” Journ. Bot. xxxiv. 1896, 
p. 379, t. 361. f. 14). 
Long. 31 p; lat. 23 p; lat. isthm. 10 p. 
Hab. On banks, Morne Micotrin, Dominica. No. 1109. 
23. C. OBLIQUUM, Nordst., * Norges Desmid.,” Acta Univ. 
Lund, vol. ix. p. 23, t. 1. f. 8. 
Long. 19-22 p; lat. 16:5-17 p; lat. isthm. 6'5-8 p; crass. 
9:5 n. 
Hab. Ou banks, Morne Micotrin, Dominica. No. 1109.—On 
rocks, Castle Bruce River (2000-3000 ft.), Dominica. No. 1697. 
#04. C. LÆVE, Rabenh. Flor. Europ. Algar. iii. p. 161; Nordst. 
in Ofvers. af K. Vet.-Akad. Forh, 1876, no. 6, p. 29, t. 12. f. 4. 
Long. 30 p; lat. 19 p; lat. isthm. 7 p. 
Hab. On leaves, Wotten Waven, Dominica. No. 1240. 
*25. C. ANNULATUM, De Bary, Conj. p. 46.—Dysphinctium 
annulatum, Näg. Gattung. einz. Alg. p. 110. t. OF. 
Var. ELEGANS, JVordst., “ Norges Desmid.,” Acta Univ. Lund, 
vol. ix. p. 23. 
Long. 36-39 u ; lat. 19-21 u. 
Hab. On rocks, Castle Bruce River (2000-3000 ft.), Dominica. 
No. 1697. 
*o6. HYALOTHECA DISSILIENS, Bréb. in Ralfs, Brit. Desm. p. 51, 
t. 1. f. 1. 
Lat. 17 p. 
Hab. On leaves in warm stream, road to Roseau Lake (2500 ft.), 
Dominica. No. 1178. 
Ord. PROoTOCOCCOIDES. 
Fam. PALMELLACER. 
#927, RHAPHIDIUM FRACTUM, 8p. n. 
R. cellulis semper singulis, gregariis, leviter curvatis, diametro 
