176 CONTRIBUTIONS 



Observations. This species resembles the Turbinella py- 

 ruloides of Conrad, which, it appears to me, more properly 

 belongs to the genus Valuta. It differs from it in being 

 more turbinate, in having five folds, in having a more ob- 

 tuse spire, and in the striae being few and distant. In 

 some of the specimens of the pyruloides in my cabinet, the 

 " obscure spiral striee" cover the whole surface of the 

 shell. 



Sixteen species have been observed in England, all in 

 the London Clay, except one, which is found in the Crag, 

 the V. Lambertii. Thirty-two are given by M. Deshayes, 

 twenty-four being in the Paris basin. In the Tertiary of 

 Maryland Mr Conrad has observed two species, solitaria 

 and Lamberti,* and at Claiborne one, the pyruloides. f 



GENUS MARGINELLA. Lamarck. 



M. anatina. Plate 6. Fig. 186. 



Description. Shell ovate, smooth ; substance of the 

 shell thick ; suture slightly impressed ; spire short, coni- 

 cal ; whorls five ; flattened above ; columella with 



folds, thickened ; mouth narrow ; outer lip much thicken- 

 ed and beautifully crenulate within. 

 Length 9-20ths, Breadth .3, of an inch. 



Observations. A single specimen only has come into 



* Fasciolaria Laraberti, (Conrad), t Turbinella pyruloides, (Conrad). 



