North American Ilelicidce. 53 



prominently developed, and in one tlie spiral strias are nearly 

 obsolete. From its peculiar general aspect tins seems even more 

 worthy of being treated as a distinct species than the typical 

 (globose) form of JS. major. II. aTbolabris is frequently found 

 with a small parietal tooth, but such shells are distinct in form 

 from n. exoleta. I have specimens of H. multilineata with the 

 same process. 



Deshayes mentions Guadeloupe, on the authority of speci- 

 mens in the Museum, as habitat, though rarely, of II. aXboldbris. 

 I need scarcely say that in this there must be some error. 



