132 
SPECIFIC 
Lister Conch, Tab. 175. Fig. 12. 
Specimen twice the size of the figure, white 
spotted with reddish brown \ ears rough, obliquely 
wrinkled. 
Inhabits the Indian Ocean. 
Fig. 2. O . varia. 
Shell equivalve ; about 30 compressed rough 
and prickly rays ; one ear very small. 
Lister Conch. Tab. 178. Fig. 15. 
Specimen yellow brown with darker clouds ; 
rather convex ; rays obsoletely spinous, inter- 
mediate spaces not striate , the smaller ear 
spinous, the larger with wrinkled plaits and 5 spines 
beneath. 
Inhabits the English coast. 
Fig. 3. O.fasciata. 
Shell equivalve ; 20 rough rays ; intermediate 
furrows striate ; ears equal, very small. 
Lister Conch. Tab. 177. Fig. 14. 
Specimen white, pellucid gaping on both 
sides, within finely striate ; margin crenate. 
Inhabits the Atlantic Ocean. 
