164 CONTRIBUTIONS 



GENUS BUCCINUM. Linnaus. 



B. Sowerbti.* Plate 5. Fig. 169. 



Description. Shell ovately conical, minutely and trans 

 versely striate over the whole surface ; substance of the 

 shell rather thick; spire short, mammillary ; suture small ; 

 whorls six, convex ; mouth ovate ; columella slightly 

 wrinkled at the base ; outer lip sharp. 



Length .5, Breadth .3, of an inch. 



Observations. This beautiful little Bucdnum is the only 

 species which has come under my notice from Alabama. 

 Its close and beautiful striae are very remarkable. 



Of this genus twenty-seven! species have been observed 

 in Great Britain, several as low as the Mountain Lime 

 stone, but chiefly in the London Clay and the Crag. M. 

 Deshayes gives ninety-five species for the Tertiary in his 

 Tables. It appears to be much more abundant in the 

 Upper Formations. The Pliocene of the Subappennines 

 furnishes twenty-seven species, Bourdeaux (Miocene) twen 

 ty-one, Paris (Eocene) nine. In this country four species 

 have been observed. Mr Say has described two from the 



* Named after the author of the Mineral Conchology&quot; of Great 

 Britain. 



i These include the genus Nassa. 



