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 
