130 CONTRIBUTIONS 



impressed ; whorls concave, carinate on the inferior part ; 

 mouth suborbicular, effuse. 



Length 1.3, Breadth 9-20ths, of an inch. 



Observations. Fragments of this species were obtained 

 quite large, together with some young ones more perfect. 

 Some of the specimens are much more striate and carinate 

 than others. It resembles in the superior part a species 

 sent me by Dr Grateloup from Dax, under the name of 

 strangulata (Grateloup). In the mouth it widely differs. 



T. lineata. Plate 4. Fig. 121. 



Description. Shell turrited, transversely and finely line- 

 ate ; substance of the shell thin ; apex acute ; suture fur 

 rowed ; whorls convex ; mouth subquadrangular. 



Length .9, Breadth .4, of an inch. 



Observations. This finely lined and pretty species seems 

 to be much less abundant than the preceding, with which 

 it cannot easily be confounded, the whorls being convex. 



This genus has been observed in Great Britain in nearly 

 all the formations from the Carboniferous Limestone to the 

 Alluvial. Five have been described in the London Clay, 

 and two in the Crag. M. Deshayes s Table of this genus 

 is very extensive, giving forty-five species (Tertiary). 

 Seventeen are from Paris, and nineteen from Italy (Subap- 

 pennines) being of the Pliocene Period. In the Cretaceous 

 Group of New Jersey and Delaware, Dr Morton has observed 



