SUBDIVISIONS OF AC TWO ID POLYPS. 



69 



mose zoophytes, is closely related in its polyps, according to 

 Prof. Verrill, to the Astrangiae, and belongs to that family. 

 Its cylindrical stems are gathered into crowded clumps. The 

 C. arhuscula is figured on page 54. 



PHYLLANGIA AMERICANA, E. & H. 



A West India species of another genus of the group, the 

 Phyllangia Americana, is represented in the annexed figure. 



In the following cut, figure 1 represents the extremity of a 

 branch of an Oculina, the 0. varicosa, of the family Oeulinidw. 



CORALS OF THE OCULINA TRIBE. 



The species of this genus grow in clumps of round branches, 

 and have very solid coralla, so white and firm when bleached 



