COLLINS. — THE ALGAE OP JAMAICA. 255 



Some of the plants from each locality have tetraspores, which appear 

 not to have been previously reported. They are arranged much as in C. 

 erecta, except that they are at the ends of short lateral branches, instead 

 of terminal on the larger branches ; the modified portions of the branches 

 being ovate or subspherical rather than lanceolate. One of the Kingston 

 specimens has cystocarps, which are spherical and external on the 

 branches, as in other species of the genus. 



Cordylecladia Peasiae n. sp. Fronds slender, filiform, arising from 

 a more or less distinct crustaceous base, dichotomously divided, with oc- 

 casional scattered or secund ramuli, usually quite short. Tetraspores 

 cruciate, in the somewhat swollen and darkened tips of the branches and 

 ramuli, immersed in the cortical layer. Cystocarps globular, sessile 

 along the main branches. Color purplish brown, changing into whitish 

 or greenish ; substance rigid. 



Somewhat resembles C. erecta, which is, however, a smaller plant, 

 much less branched, and having the receptacles for tetraspores larger and 

 of different shape. C. conferta and C. Andersoniana have the tetra- 

 spores in densely tufted special lateral branches. C. irregularis is stouter, 

 with hollow steins and with oval or subspherical lateral branches for the 

 tetraspores. In C. furcellata the tetraspores are borne in branches resem- 

 bling the vesicles of Chrysymenia uvaria. C. heteroclada has a flat 

 frond, and C. Huntii is unrecognizable from the description of Harvey. 



Manchioneal, July, 1900, P. & B. P. B.-A., No. 791. 



Chrysymenia halymeuioides Harv. Washed ashore, Morant Bay, 

 July, 1894, P. & B. 



Champia parvula (Ag.) Harv. Montego Bay, Port Maria, 1900, 

 P. & B. 



Caloglossa Leprieurii (Mont.) J. Ag. Among Bostrychia, just above 

 water level, Port Antonio, July, 1900, P. & B. 



Asparagopsis Delilei (Ag.) Lamour. In tree-like tufts, Navy Island, 

 March 10, 1893, II. 



Laurencia cervicornis Harv. Annotto Bay, Aug., 1894; washed 

 ashore, Kingston, July, 1900, P. & B. 



L. implicata J. Ag. Morant Bay, July, 1900, P. & B. 



L. obtusa (Huds.) Lamour. In tufts on rocks, Kingston Harbor, 

 Apr. 8, 1893, No. 376 ; no locality, No. 224, H. Port Antonio, July, 

 1891; on rocks, Montego Bay, June, 1900, P. & B. Near Kingston, 

 Duerden. Chitty. 



L. papillosa (Forsk.) Grev. In tufts on rocks, Kingston Harbor, Apr. 

 8, 1893, II. Port Antonio, Kingston, Montego Bay. Manchioneal, Port 



