* _ 
& 
P 
96 Description of ome New Species of Fossil Shells. 
Shell conical, ventricose, umbilicate, very thick, smooth, pol 
ished; umbilicus small; sutures impressed ; whorls four, fat 
mouth round. 
Length ‘07. Breadth -05 of an inch. 
Remarks.—This little species has no remarkable characters, 
but I cannot identify it with any described species. It’ some- 
what resembles T’. naticoides, Lea, but its greater elevation and 
smalk mouth, ‘besides its not being so large, readily distinguish it 
from that species. I regret that from my single specimen having 
the mouth broken, I cannot determine whether it has the outer 
lip reflexed. 
: Genus 'T'rocnus.—Linneus. 
T. planulatus. Pl. 1, fig. 9. 
T. testa lenticulata, sub-crassa, levi, polité; anfractibus qua- 
ternis, convexis ; ultimo anfractu acuté carinato; suturis parvis ; 
umbilico magno ; apertura elliptica. 
Shell lenticular, somewhat thick, smooth, polished ; whorls 
four, convex ; last whorl acutely carinated ; sutures small; um- 
bilicus small ; mouth elliptical. 
Length ‘05. Breadth +1 of an inch. 
Remarks.—It is with considerable doubt that I have placed 
this shell in the genus Trochus, to which it seems, however, to 
belong, from the absence of crenulations on the umbilicus, which 
is not as large as in most Solarie to which this shell would, at 
first sight, be referred. Its mouth, however, is perfectly ellipti- 
cal, which seems to indicate a connection with the Turbo, to 
which, indeed, it bears a considerable affinity. It is remarkable 
as being the first Trochus observed in the deposit at Claiborne. 
Genus Turniretta.—Lamarck. 
T. carinata. PI. 1, fig. 10. 
T’. testa turrita, crass4, transverse striata et carinata ; anfracti- 
bus , valde convexis, carinatis medio; suturis parvis ; ape: 
tura rotunda, sub-effusa. 
Shell turrited, thick, transversely striate and carinated ; whorls 
, Very convex, carinated in the middle ; sutures small ; mouth 
round, somewhat effuse. 
Length Breadth ‘2 of an inch. 
Pine 
“ 
ie 
a 
