148 AMERICAN JOURNAL 



Description. — Volutions nine, each witli four transversely- 

 striated grooves, except the body whorl, which has twelve ; 

 base slightly umbilicated ; labium grooved within. 



CONUS, Lin. 

 C. ALVEATUS, nob. — t. 11, fig. 4. 



Description. — Oblong-turbinate, thin in substance; sides 

 straight below and slightly convex above; summit of body 

 volution and each whorl of the spire profoundly carinated ; 

 spire very short, with a slightly concave outline; base with 

 impressed revolving lines. 



Locality — Yicksburg, Miss. 



This species differs from the Eocene sauridens, in having a 

 less elevated and a more profoundly carinated spire, and the 

 revolving lines on the spire are less numerous than in the 

 former. 



C. SUBSAURIDENS, nob. — t. 11, fig. 9. 



Description. — Elongately acutely conical, with straight 

 sides, slightly curving towards the summit of body whorl; 

 summit and spire sharply carinated ; three volutions from the 

 apex exserted. 



Locality. — From the Burrstone, probably, of Alabama. 



The specimen is silified. It differs from the preceding 

 species in form, and the lower part has much finer, more 

 equal, and more numerous revolving lines. 



