242 PROCEEDINGS OP THE AMERICAN ACADEMY. 



C. pilosa Harv. On Bostrychia tenella, Port Antonio, Aug., 1894, 

 P. & B. 



Dichothrix penicillata Zan. On Cymopolia barbata, Port Maria, H. 

 On Dictyota dichotomy P. & B. P. B.-A., No. 62. 



*Gloeotricbia natans (Hedw.) Rab. Under Nymphaea leaves, Botanic 

 Garden, Castleton, April, 1893, H. 



*Spirogyra decimina (Muell.) Kuetz. Mauchioneal, July, 1900, 

 P. & B. " 



The spores agree with this species, and as far as can be judged from 

 dried specimens, the vegetative characters. A sterile Spirogyra from 

 Bath has the same dimensions of cells, but cannot be specifically deter- 

 mined. 



Ulva fasciata Delile. In dense masses just below water mark, but 

 only in one limited locality, Port Antonio, July, 1891, P. & B. 

 P. B.-A., No. 221. Near Kingston, Duerden. 



U. Lactuca var. rigida (Ag.) Le Jobs. Port Antonio, Aug., 1894; 

 Kingston, Montego Bay, June, 1900, P. & B. Near Kingston, Duerden. 



Enteromorpha erecta (Lyng.) J. Ag. Port Antonio, April, 1892, 

 P. & B. 



E. flexuosa (Wulf.) J. Ag. Port Antonio, July, 1891 ; Runaway 

 Bay, July, 1900; washed ashore, Mauchioneal Bay, July, 1900, P. & B. 

 Near Kingston, Duerden. 



E. intestinalis (L.) Link. Port Antonio, washed ashore, July, 1894, 

 P. & B. 



E. prolifera (Muell.) J. Ag. Runaway Bay, Montego Bay, Manchi- 

 oneal, on stones; also in fresh water at Bath, on stones in river, 1900, 

 P. & B. 



*Stigeoclonium tenue (Ag.) Rab. No. 366, H., locality not given. 



Diplochaete solitaria n. g. & sp. Frond epiphytic, consisting of 

 a single cell, with thick, transparent wall, and bright green contents, 

 spherical or flattened, the outline as seen from above round or slightly 

 oval ; two hairs arising from each cell, usually opposite, and from points 

 on the under surface quite near the edge. Cell 25-30^ diameter, 

 half this diameter being occupied by the wall ; hairs 4-6/* diameter, 

 slightly tapering, straight. On Laurencia obtusa, near Kingston, 

 Duerden. 



This minute plant was observed on a specimen of Laurencia, after it 

 had been mounted for the herbarium, so that nothing is known as to its 

 development, but it seems so distinct from any described genus of the 

 Chaetophoraceae as to require a new name. 



