TO GEOLOGY. 175 



V. Parkinsonil* Plate 6. Fig. 184. 



Description. Shell subturbinate, very closely covered 

 with minute, transverse striae ; substance of the shell rather 



thin ; spire ; suture linear ; whorls , flattened 



above ; mouth rather contracted ; columella with four 

 folds ; outer lip sharp. 



Length .... Breadth .4, of an inch. 



Observations. This very closely resembles the last spe 

 cies. It differs in being less turbinate, in having more 

 closely set striae, and in having one tooth less in number. 

 Unfortunately, I have but one specimen, and that with the 

 spire removed. The relative character of four or five folds, 

 in this and the last described, may differ in other individu 

 als. The species are, nevertheless, distinct. 



V. Cooperil-\ Plate 6. Fig. 185. 



Description. Shell pyriform, inflated, obtusely angular 

 above, furnished on the inferior part with about ten distinct, 

 oblique, distant strias ; substance of the shell somewhat 

 thick ; suture small and subgranulate ; spire very slightly 

 elevated, rounded at the apex ; whorls flattened above ; 

 canal very short and wide ; columella with five folds ; 

 mouth long and lunate. 



Length 1 .2, Breadth .9, of an inch . 



* Named after the author of &quot; Organic Remains&quot; and &quot; Outlines of 

 Oryctology.&quot; 



t Named after my friend, William Cooper, distinguished for his know 

 ledge in natural science. 



