240 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Lyngbya aestuarii (Mert.) Liebm. In mats on stones, Kingston, April, 

 1893, H ; Port Antonio, July, 1891, P. & B. Near Kingston, Duerden. 



L. confervoid.es forma violacea n. f. In company with L. ma- 

 juscula, Manchioneal Bay, July, 1900, P. & B. Differing from the type 

 only in color. 



L. majuscula Harv. Forming a film on marine algae, Port Antonio, 

 March, 1893, H. Same locality, July, 1891, P. & B. Forming exten- 

 sive tufts on muddy bottom, near the mouth of a small stream, Manchio- 

 neal Bay, July, 1900, P*. & B. 



*L. putalis Mont. Morant Bay, July, 1900, P. & B. 



*L. versicolor (Wartm.) Gomont. Marine Garden, Kingston, II. 

 P. B.-A., No. 54. 



Symploca hydnoides Kuetz. var genuina Gomont. On rocks in shallow 

 water, in small patches, not abundant, Montego Bay and Manchioneal 

 Bay, 1900, P. & B. 



S. hydnoides var. fasciculata (Kuetz.) Gomont. With var. genuina, 

 P. & B. 



*Plectonema Nostocorum Bornet. Among Gloeocapsa quaternata, 

 Bath, July, 1900, P. & B. 



*P. Wollei Farlow. Morant Bay, Aug., 1894, P. & B. Roaring 

 River, H. P. B.-A., No. 55. 



*Schizothrix coriacea (Kuetz.) Gomont. In tufts on sides of lily 

 tanks, Botanic Garden, Castleton, April, 1893, H. 



*S. Mexicana Gomont. On rock in " AVag Water," Castleton, April, 

 1893, No. 399, H. 



Microcoleus chtbonoplastes (Fl. Dan.) Thuret. In turfs of algae, St. 

 Ann's Bay, March, 1893, H. 



M. tenerrimus Gomont. In company with M. chthonoplastes, March, 

 1893, H. 



*M. vaginatus (Vaucb.) Gomont. On moist rock, Rio Cobre, Bog 

 Walk, April, 1893, II. 



*Nostoc commune Vauch. In crusts on sandy soil, Constant Spring, 

 April, 1893, No. 365, H. 



*N. microscopicum Carm. On steps into reservoir, Constant Spring, 

 April, 1893, No. 361, H. The specimens are sterile, so that the deter- 

 mination is somewhat in doubt. 



*N. verrucosum Vauch. On rocks in "Wag Water," Castleton, April, 

 1893, H. No. 362, H., from trough in running water, Castleton, April, 

 1893, is probably the same species. 



*Cylindrospermum muscicola Kuetz. On sides of basin, Constant 



