WEST INDIAN FRESHWATER ALGE 285 
19. oy acutum Bréb. Trinidad.—Pools on the Pitch Lake, 
La oo 
"te OSMARIUM apie aa Bréb. Trinidad.—In fountains, Roy. 
Bolan! Gardens, St. A 
21. C. gaLerituM Noni Forma apicibus minus truncatis et 
subretusis. Long. 41 »; lat. 40 »; lat. ier ck Pp; crass. 21 p. 
Trinidad. gen on Aa Piteh Lake. (Fig. 
22. C. ossotetum Reinsch. The specimens observed were all 
small fois similar to hake observed from Koh Chang (cf. West & 
G West in Botanisk Tidsskrift, xxiv. 1901, p. 172). Long. 
47 pw; lat. 50, Bi lat. isthm. 12°5 »; crass. 26 ph. Dominica.— 
Rosen Mie 
23. C. Lave Rabeuty Lone. 16-24 pw; lat. 13-5- AT a’ tt. 
isthm, 3-4:2 p. 7 Hosea — Government Farm, St. Clair; Roy. 
ciuamy Gardens, St. Ann 
. C. IMPRESSULUM Blt. Long. be #; lat. 23 w; lat. isthm. 
5 se "Beis dos.—Graeme Hall Swam 
25. C. Lisoneense West & G. S. West in Journ. Bot. April, 
1897, D. ah t. 868, f. 12 
INEVOLUTUM var. n. (Fig. 14.) Var. crenis lateralibus 
beste: $ setnzaell nha a vertice visis ellipticis, ad medium yore 
leviter in fae spr eancutb De binis. Long. 44 p; lat. re 
isthm. 11°5 p s.21 py. Barbados.—Near Bridgetow 
This cae abla be compared with Cosmarium ace eu. 
datum W. & G. 8. West, from which it is distinguished by it 
relatively greater fengtle, its more ees aes semicells with ee 
rower apices, and by the inflated ee 
26. C. rormosuLum Hoff Long. 44 p; oe 88 y; lat. isthm. 
115 p. Barbados.—Bay Estate ee 7 ee e Hall Swamp. The 
specimens ao Rok quite typical, dificring. | in the possession of 
smooth apices 
a7, ©. eg ee Nordst. Long. 24 »; lat. 19-5-22 Lape lat. 
mar cm : #; crass, 12°5 p. Barbados.—Bay Estate. e speci- 
men e rather small, but were otherwise similar to the type, 
and the ‘chloropiaa were furnished with two pyrenoids. 
28. C.sublatifrons, sp.n. (Fig. 16.) C. minutum, tam longum 
quam latum, profundissime constri ctum, sinu angustissimo- -lineari ; 
semicellule obtrapeziformes, lateribus leviter convexis, angulis 
sparse et irregulariter granulata, in centro cum 
annulo iehissAtbrane 7 ciream granulum majus centrali; a pee 
vise Solange tumore granulato in media utrobique. Long. 2 
lat. he 19°5 »; lat. isthm. 4°5 »; crass. 14°5 p. kaa — 
Bay Est 
