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Description of some New Species of Fossil Shells. 101 
T’. multiplicata. PI. 1, fig. 19. 
T. testa sub-turrita, elongata, crassa, transversé striata, longitu- 
dinaliter costata, costis maximis; anfractibus —, valde convexis; 
suturis impressis ; basi striata; columella quatuordecim plicis min- 
imis; apertura ovata; canaliculo sub-recurvo. 
Shell sub-turrited, elongated, thick, transversely striate, longi- 
tudinally costate, with very large cost ; whorls , Very con- 
vex; sutures impressed ; base striate ; columella with fourteen 
very small folds; mouth ovate; channel small, somewhat recur- 
ved 
Length Breadth 25 of aninch. 
Remarks.—This species much resembles the 'T. gracilis, Lea, 
but may be easily distinguished from that shell by the folds on 
the columella, its larger size, and its more strongly defined ribs. 
The mouth is -25 of an inch long. Its apex seems to be very 
fragile, for, although I have several specimens, that figured is the 
most perfect. 
FAMILY COLUMELLARIA. 
Gernus Mrrra.—Lamarck. 
M. gracilis. Pl. 1, fig. 20. 
M. testa sub-turrita, tenui, longitudinaliter et indistincte striata, 
linea transversa propé suturas ; spira acuta, valde elevata; suturis 
Impressis ; anfractibus , planulatis; basi striata; columella 
triplicata; apertura sub-elliptica. 
Shell sub-turrited, thin, longitudinally and indistinctly striate, 
With a transverse line near the sutures ; Spire acute, very much 
elevated ; sutures impressed ; whorls , flat; base striated ; 
columella with three folds ; mouth sub-elliptical. 
Length ——. Breadth -1 of an inch. 
Remarks.— This little species has the outer lip sharp and with- 
out Strie. It resembles M. lineata, Lea, in having the longitu- 
dinal striae and transverse line, but differs from that species in 
other respects. As T have met with but one specimen of this 
shell, and that with the spire fractured, I am not able to give its 
length and number of whorls. From the appearance of what I 
have, I should judge the spire to be very elevated. 
