from the Coast of Suffolk, 



219 



right angles to the axis of the shell ; while in the fossil under 

 notice it is simply confined to the margin of the inner lip, 

 and appears not to have been produced until the shell had 

 attained its full period of growth. 



In the former cases, too, there is either a corrosion of the 

 columella, or an extension of shelly matter over its surface ; 

 neither of which conditions exists in the present specimen. 

 The shell is destitute of varices, and is covered with very 

 regular spiral striae, which are uniformly disposed over the 

 whole surface, giving the fossil a handsome appearance. The 

 volutions are six, and the apex of the shell is remarkably 

 obtuse, resembling that of Voliita Lamberti. The length of 

 the aperture nearly equals that of the spire, and its width is 

 about two thirds of its length. 



From the circumstance of this fossil having been procured 

 from the beach, and as it is the only specimen of the kind 

 with which I am acquainted, the particular deposit whence it 

 has been derived cannot be positively determined. It has not 

 the very recent character presented by many specimens of 

 Voliita Lamberti, which are found under similar circumstances ; 

 and, from its possessing some of the ferruginous appearance 



r 2 



