248 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Maii} r specimens agree with the description of C. Mexicana J. Ag., but 

 all intermediate forms occur, and often the same individual will agree with 

 one species in one part of the frond, with the other in other parts. 



E. Mitchellae Harv. ? Kingston, March, 1893, Nos. 141, 142, 372, 

 H. Not exactly like the type of this species, the plurilocular sporangia 

 being longer and sometimes clavate. Possibly E. Duchassaingianus 

 Grunow. 



Striaria attenuata (Ag.) Grev. Montego Bay, June, 1900, washed 

 ashore on sandy beach, P. & B. 



S. attenuata var. ramosissima (Kuetz.) Hauck. With the type, June, 

 1900, P. & B. 



Colpomenia sinuosa (Roth) Derb. & Sol. On coral rocks, Port Anto- 

 nio, March 8 and 23, 1893, Nos. 153 and 212; Port Maria, March 17, 

 1893, No. 273, H. Annotto Bay to Port Antonio, in shallow water, 

 Aug., 1894, P. & B. 



Hydroclathrus cancellatus Bory. On coral rocks, Port Antonio, Feb. 

 10, 1893, No. 234, H. 



Cutleria sp. A single specimen, attached to a frond of Udotea flabel- 

 lata, seems to be the Aglaozouia form of some Cutleria, but in the absence 

 of fruit it is indeterminable. The frond consists of radiating articulate 

 filaments, united laterally, and varying much in diameter. 



Turbinaria trialata Kuetz. Washed ashore, Port Antonio, March 8, 

 1893, No. 211 ; in tide pools, Port Maria, March 16, 1893, No. 249, H. 

 Washed ashore, Port Antonio, July, 1891; Montego Bay, July, 1900, 

 P. & B. P. B.-A., No. 774. T. vulgare, Sloane, is undoubtedly this 

 species. 



Sargassum bacciferum (Turn.) Ag. Washed ashore, Port Maria, 

 March 18, No. 248, H. Sloane, Chitty. 



S. lendigerum (L.) Kuetz. Washed ashore, Port Antonio, July, 

 1891, P. & B. In tufts in tide pools, Port Maria, March 17, 1893, No. 

 292, H. 



S. platycarpum Mont. Washed ashore, Port Antonio, July, 1891, P. 

 & B. Same locality, March 8, 1893, No. 210, H. P. B.-A., No. 775. 



S. vulgare Ag. Washed ashore, Port Maria, March 18, 1893, No. 

 247, H. The references to Sloane and Chitty are doubtful, and some 

 other form may have been referred to under this name. 



S. vulgare forma ovata n. f. Washed ashore, Montego Bay, June, 

 1900, P. & B. P. B.-A., No. 776. Leaves thick, dark, ovate to subor- 

 biculate, coarsely and sharply, sometimes doubly toothed, usually slightly 

 oblique at the base. The branching is dense, the leaves numerous and 



