38 



body whorl: striae alternating in size: five volutions; spire 

 elevated and pointed. Lip thickened towards the margin. 



Variety, C. Destitute of carinations, and probably the 

 young shell. Length about an inch. 

 . Locality, Claiborne, Alab. 



Cab. Acad. N. S. 



FISSURELLA. 



F. tenebrosa. PI. 17. fig. 5. 



Shell ovate or oval, elevated, with numerous delicate raised 

 costse, decussated by transverse striae ; inferior margin with 

 impressed lines : apex pointed. Length 1 inch. 



Locality, Claiborne, Alab. 



Cab. Acad. N. S. 



CONUS. 



C. sauridens. PI. 17. fig. 6. 



Shell smooth except at base, which is obliquely striated ; 

 whorls of the spire flattened, striated ; apex pointed ; mouth 

 narrow ; shoulder angular. Length 1 inch. 



Locality, Claiborne, Alab. 



Cab. Acad. N. S. 



MARGINELLA. . : 



1. M. larvata. PI. 17. fig. 7. 



Shell smooth, thick; spire obsolete; with from six to eight 

 teeth on the columella. Length I of an inch. 

 Locality, Claiborne, Alab. 

 Cab. Acad. N. S. 



2. M. crassilabra. PI. 17. fig. 8. 



Shell smooth, thick ; spire elevated ; varix on the outer lip 

 very thick and extending upon the spire ; lip crenated on its 

 inner edge; nine or ten teeth on the columella. Length less 

 than J an inch. 



Locality, Claiborne, Alab. 



Cab. Acad. N. S. 



[55] 



