ALGZ FROM THE WEST INDIES. 277 
Long. cell. sine teg. 5°5-6°5 wp, c. teg. 13°51; lat. cell. sine 
teg. 1'8 p, ce. teg. 9°5-10°5 pu. 
Hab. On damp wall of dam, Sharp’s River, St. Vincent. 
No. 477. 
Forma cellulis 5-6plo longius quam latius. (Pl. XIV. fig. 26.) 
Long. cell. s. teg. 11°5-13°5 p, c. teg. 21; lat. cell. s. teg. 
2-2°3 u, c. teg. 11°5-12°5 p. 
Hab. With the typical form. 
46. GL@OTHECE LUNATUM, nov. sp. (PI. XVI. fig. 9.) 
G. cellulis 2-4 in familiis consociatis, subcrescentiformibus, 
2plo longius quam latius, apicibus acutis; tegumentis univer- 
salibus, ovalibus vel ellipticis; cytioplasmate wrugineo et ho- 
mogeueo. 
Lat. cell. 2°5-2°'7 »; apicibus cellularum 4°8-5°7 w inter se 
distantibus ; famil. 325 x19 p. 
Hab. With Gl. linearis, Naeg., but very scarce. 
47. APHANOTHECE sAxicoLa, Naeg. (L.c. p. 59, t. 1 u. f. 2.) 
Lat. cell. 1:4-1°8 p. 
Hab. In small masses of 70-120 u in diameter, amongst mosses 
on trees, summit of Trois Pitons (4500 ft.), Dominica. Nos. 903 
and 904. Rather scarce. 
48. A. mrcroscoprca, Naeg. (L.c.t. 14. f. 1.) 
Long. cell. 5°5-7'5 ; lat. cell, 3°8-4'4 4; diam. famil. 108—- 
179 p. 
Hab. On damp wall of dam, Sharp’s River, St. Vineent. 
No. 477.—Amongst Symploca cuspidata, n. sp., on trees, summit 
of Trois Pitons (4500 ft.), Dominica. No. 904. 
49, TerRAPEDIA TRIGONA, nov. sp. (PI. XVI. fig. 8.) 
T. cellule triangulares, lateribus concavis, angulis subrotun- 
datis ; a latere vise elliptice ; cytioplasmate pallide erugineo et 
homogeneo. 
Lat. cell. 7°2 w; crass. 3°6 p. 7 
Hab. On damp wall of dam, Sharp’s River, St. Vincent. 
No. 477. 
Class DIATOMACEF. 
50. Eprrnemra WESTERMANN, Auetz. (Pritch. Infus. ed. 1861, 
p. 760, t. 4. £. 2.) MeN gg 
Hab. In stream, crater of Grande Soufri¢re, Dominica. Nos. 881 
and 908. 
