FRESHWATER ALG^ OF THE WEST IXDIES. 285 



7-10-plo longioribus, apices versus plus incurvatis, apicibus 

 acutis ; conteutuni chlorophyllosum cellularuni viride, in partibus 

 subsequalibus quatuor distincte divisum. 



Long. 19-36-5^; lat. 2-6-3-4 p. 



Sab. In stream, Wotten "Waven, Dominica. No. 1249. 



This species is nearest to Rhaphiclium Braunii, Nag. (in Kuetz 

 Spec. Algar. p. 891 ; Kabenh. Elor. Europ. Algar. iii. p. 45), but 

 the form of the cells, which are narrower, and the peculiar 

 division of the contents easily distinguish it. Some specimens 

 were noticed in which the contents were divided into 3 or 5 parts, 

 but these were abnormal and very scarce. 



*28. Ooctstis solitaria, Wlttr. in Wittr. 8f Nordst. Alg. 

 Exsic. no. 244. 



Sab. On trees in woods round Roseau Lake, Dominica. 

 No. 1164. 



*29. Gtlceoctstts gigas, Lagerh. in Of vers, of K. Vet.-Akad. 

 Fork. 1883, no. 2, p. 63. Protococcus gigas, Kuetz. Phyc. Germ. 

 1S45, p. 145. Chlorococcum gigas, Grun. 



Hal. With the preceding species. 



*30. Trochiscia aspera, Hansg. in Sedwigia, 1888, Heft 5 

 u. 6. Acanthococcus aspera, Beinsch, in Berichte der Deutsch. 

 lot. Gesellsch. in Berlin, 18S6, p. 239, t. ll.Jf. 2. 



Diam. cell. 15-17*5 /i. 



Hah. In stream, Wotten Waven, Dominica. No. 1249. 



Class MYXOPHYCE.E. 

 Ord. Hormogone^:. 



Sub-ord. Heterocxstej. 



Earn. Rivttlariace^:. 



*31. Calothrix epiphttica, West 4' & S. West, " Welw. 

 Afric. Freshiv. Alg." Jonrn. Bot. xxxv. 1897, p. 240. 



Rob. Epiphytic on Tolypothrix byssoidea, on leaves, Wotten 



Waven, Dominica. No. 1210. 



i2 



