222 
species of Galaxaura and Gracilaria. Bryothamnion triquetrum ,* 
a plant that is very common in some parts of the West Indian 
seas and is apparently ran? in other parts, is here an im- 
portant element in the algal flora. Amphiroa T: bul, a coreiee 
alga, a specimen of which a this locality 
report,t is another red seaweed that finds an airasually gooa 
development at the mouth of Guanica Harbor. 
long the northern coast of Porto Rico the sea-bottom drops 
off abruptly to ocean depths, but along the southern coast there 
is a sublittoral shelf from one to eight miles broad and covered 
Parguera Cove, on Cayo Don Luis, and Salinas Cove, and 
to vindicate the foresight that led to its incorporation in the 
vessel’s equipment. 
In Salinas Cove, as has been my experience at various other 
points i in the West Indies, Halimeda tridens, H. Monile, and H. 
* Fucus triqueter S. G. Gmel. Hist. Fuc. 122. pl. 8. f. 4. 1768. (Not Fucus triqueter 
L. Mant. 312. 1771. 
Fucus trifarius Swartz, - od. 148, 
Fucus triangularis J. F. Syst. A ae 1791 
Bryothamnion ee ie Sp. Alg. 8 ‘A 
N.Y. Bot. Gard. 4: 173. f. 19. 
