Description of some New Species of Fossil Shells. 101 



T. multiplicata. PL 1, fig. 19. 



T. testa sub-turrita, elongata, crassa, transverse striata, longitu- 



dinalitercostata, 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 costse ; 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 an inch. 



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. 

 Genus Mitra. — Lam,arck. 

 M. gracilis. PL 1, fig. 20. 



M. testa sub-turrita, tenui, longitudinaliteret indistincte striata, 

 linea transversa prope 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 striae. 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. 



