83 



fliell ; the chambers gradually decreafe in fize towards the 

 poflerior end : the concave fide is opaque by reafon of the 

 continuation of the fyplion through all the concamerations, 

 l)ut there is neither margin nor carina on either fide. 



Length above one eighth of an inch ; breadth one fixth of 

 its length. Extremely rare, in fand on the coalts of Kent, 

 and South Devon. 



This is undoubtedly tlie JsTautilus Legumen o^hmnJLUs, 

 and is certainly the flicll intended by Walker, fo that we 

 have transferred all the fynonyms from JV. reSlus, where 

 they had been placed with fome doubt. 



We are now quite clear that our worthy friend Mr, Boys 

 liad by niiflake fent us that fliell for fig, 74, of Walker, a 

 Ipecies which does not apjjear to have been well known to 

 that excellent conchologift ; for amongfl all the drawings 

 we have been favored with, both by him and Mr. Henry 

 Boys, nothing like that has appeared. The figure however 

 given in Tejlacea Mimda Ratiora is by no means correct. 



The figure here referred to muft, we believe, be con- Costatus 

 fidered as a mere variety of that before given in Te/iacea Var. 

 Bnia?imca, Tab. I4,, fig. 5 ; and if we may judge from ob-Tab. 19, f. 2. 

 fervation it feems to be l'ubje6t to very great variation. 



L 2 This 



