GENUS I. HOPLANGIA (Gosse). 



Phyllangia (Gosse). 



Corallam incrusting foreign bodies. 



Corcdlites rather short, formed by buds which 

 spring from an expansion around the base of the 

 parent, permanently united to it (but not to each other) 

 by the inferior portions of their walls. 



Wall surrounded by a thin porcellanous coat (ejn- 

 theca), which permits the ribs to be traced through it ; 

 granulate. 



Ribs thin, sharp, low, very unequally distinct. 



Columella a broad surface of rough papilla?, 

 merging into the plates. 



Palules wanting. 



Plates thin, scarcely salient, unequal, straight, 

 granulose, toothed on the edges, except the upper 

 edges of the primaries, which are nearly entire. 



There is but one species, H. Durotrix. 



