G. JANIA. 123 



Var. B. Inclining to pyriform ; solitary ovaria on 

 each branch. — Plate 9. fig. 7. 

 South America. 



Var. C. Crested, or like a plume ; with truncated 

 ovaria. 

 European seas. 



Var. D. Seeded ; ovaria numerous, with long seta- 

 ceous appendages. 

 European seas. 



Var. E. In links. 

 European seas. 



Var. F. Surface of the articulations sometimes 

 covered with small projecting asperities. 

 Mediterranean. 



Var. G. In no wise differs from Var. A. except in 

 being considerably smaller. 

 America. 



HORNED. 



9. Jan I A comiculata. Articulations of the stems 

 and branches slightly compressed in the upper part, 

 the sides terminating in setaceous appendages, vary- 

 ing in length. 



Var. A. Appendages short. 



Var. B. Polypidom very small, appendages long. 



Var. C. Polypidom of moderate size ; appendages 

 long and curly. 



