: os 
4 i. . . 
Description of some New Species of Fossil Shells. 97 
. *% 
Remarks.=There are three strie and a carina.on each whorl, 
but as I have but a single specimen, I cannot determine whether 
this is a constant character. The strie are very small, and ‘are 
arranged, one near each suture and one on the under side of the 
carina, near its vertex. The whorls, from the magnitude of the 
carina, resemble a double ¢one, truncated at both ends. My spe- 
cimen is fractured at the apex, so that the length and number of 
whorls cannot be satisfactorily determined. 
a 
T. monilifera. Pl. 1, fig. 11. « 
T. testa turrita, tenui, transverse striata, striis muricatis vel mo- 
niliferis ; spiré acut&; anfractibus , sub-planulatis ; suturis 
impressis ; apertura sub-quadrilaterali. Te ae 
Shell turrited, thin, transversely striate, with muricate or moni- 
liferous strie ; spire acute ; whorls , Somewhat flat; sutures 
impressed ; mouth sub-quadrilateral. 
ength Breadth -25 of an inch. ; 
Remarks,—This shell has four striz, three large and one small 
one, which is near the upper suture. The sutures are very small 
from the flatness of the whorls. It bears a slight resemblance to 
- Some specimens of T. lineata, Lea, but may easily be distin- 
guished from that species by the striae being moniliferous, and 
the less convexity of the whorls, &c. 
1. grachs. Pi. 1, fig. 12. 
T. testa turrita, tenui, transverse striata, striis latis; spira at- 
tenuata, acuta; anfractibus , sub-concavis ; suturis impressis ; 
apertura sub-quadrilaterali.. 
Shell turrited, thin, transversely striate, with broad strie; spire 
attenuated, acute ; whorls , Somewhat concave; sutures im- 
Pressed ; mouth sub-quadrilateral. 
Length —_, Breadth -1 of aninch. , 
Remarks.—In this shell there are two broad striz, or rather 
elevations, which make the whorls convex. They are placed, 
one in the middle and the other in the upper part of the whorl. 
The sutures are distinct. This species seems to be very fragile, 
for although I have Seen a number of specimens, none of them 
are ReLPel, most of them having the apex, and all the base, frac~ 
Ted, tas pe oe 
~ Vol. x1, No. 1.—Oct.~Dec. 1840. 13 
