291 FRESHWATER ALGF OF THE WEST INDIES. 
Fam. SYNEDREX. 
#79, SYNEDRA PULCHELLA, Kuetz. Bacill. p. 08, t. 29. f. 87. 
Hab. In small stream, Roseau Valley, Dominiea. No. 1176.— 
In stream, Wotten Waven, Dominica. No. 1249. 
#80. S. Raprans, Grun.; Van Heurck, Diatom. (Engl. transl.) 
p. 312, t. 10. f. 493. 
Hab. In stream, Wotten Waven, Dominica. No. 1249. 
Fam. Dratomea. 
*81. DENTICULA TENUIS, Kuetz. Bacill. t. 18. f. 8. 
Var. INFLATA, Van Heurck, Diatom. (Engl. transl.) p. 352, 
t. 11. f. 462.—D. inflata, W. Sm. 
Hab. In small stream, Roseau Valley, Dominica. No. 1176.— 
Head of Castle Bruce River, Dominica. No. 1484. 
Fam. NirzscHirg x. 
82. NrirzscuriA DISSIPATA, Grun.; Van Heurck, Diatom. 
(Engl. transl.) p. 394, t. 16. f. 525. (? N. minutissima, W. Sm. 
Brit. Diat. p. 41, t. 13. £. 107.) 
Hab. On leaves in warm stream, road to Roseau Lake, 
Dominica (2500 ft.). No. 1178.—On leaves, Wotten Waven, 
Dominica. No. 1240.—On ground, crater of Grande Soufricre 
(2000-3000 {t.), Dominica. No. 1832. 
*83. N. optusa, W. Sm. Brit. Diat. i. p. 39, t. 13. f. 109. 
Var. NANA, Grun.; Van Heurck, Diatom. (Engl. transl.) 
p. 398, t. 16. f. 539. 
Hab. On bank, at roadside, Emsol, near Roseau, Dominica. 
No. 983. 
84. N. LINEARIS, W. Sm. Brit. Diat. i. p. 39, t. 13. f. 110. 
Hab. In small stream, Roseau Valley, Dominica. No. 1176. 
Var. TENUIS, Grun.—N. tenuis, JF. Sm. 
Hab. On ground, crater of Grande Soufrière (2000-3000 ft.), 
Dominica. Nos. 1832 and 1835. 
*85. N. communis, Rabenh.; Flor. Europ. Algar. i. p. 159. 
Hab. Among Nostoc muscorum, Agardh, on sides of road, Fort 
Charlotte, St. Vincent. No. 203.—On bank, at roadside, Emsol, 
near Roseau, Dominica. No. 983. 
