132 SPECIFIC 



Lister Conck. 1. 175. f.\2. 



Specimen twice the size of the figure, white 

 spotted with reddish brown ; ears rough, obUquely 

 wrinkled. 



Inhabits the Indian Ocean. 



Fig. 2. O. varia. 



Shell equivalve; about 30 compressed rough and 

 prickly raysj one ear very small. 



Lister Conch, tab. 178. fig. 15. 



Specimen yellow brown with darker clouds ; ra- 

 ther convex ; rays obsolctely spinous, intermediate 

 spaces not striate ; the smaller ear spinous, the 

 larger with wrinkled plaits and 5 spines beneatli. 



Inhabits the English coast. 



Fig. 3. O.fasciata. 



Shell equivalve ; 20 rough rays ; intermediate 

 furrows striate j ears equal, very small. 



Lister Conch, tab. 177. fig. 14. 



Specimen white, pellucid, gaping, on both sides, 

 within finely striate; margin crcnate. 



Inhabits the Atlantic Ocean. 



