F. Borgesen: Rhodophyceæ of the Danish W. Indies. 



191 



St. Croix: off Frederiksted, in White Bay. St. Jan: off America Hill 

 and in several places in the sound between this island and St. Thomas. 

 Geogr. Distrib. : West Indies. 



Fig. 180. Corallina cu&ensi5 (Mont.) Kütz. Transverse section 

 of a tetrasporic conceptacle. (About 80:1). 



Jania Lamx. 



In various papers Yendo ^) points out that the most charac- 

 teristic feature l3y which Jania is distinguished from Corallina is 

 the dichotomous ramification of the filaments as against the pin- 

 nated branches in Corallina. I agree with Yendo in this point 

 of view. 



1. Jania pumila Lamx. 



Lamouroux, I. V. F., Hist. Polyp, corallig. flexib., 1816, p. 269, pi. 9, 

 fig. 2. Areschoug, I. E. in J. Agardh, Spec. Alg. vol. II, p. 559. 



1) Yendo, K., Principle of systematizing Corallinæ (The Botanical Maga- 

 zine, Tokyo, 1905, vol. XIX, p. 123) and A revised list of Corallinæ 

 (Journal of the College of Science, Tokyo 1905, vol. XX, p. 2). 



