100 Description of some Next) Species of Fossil Shells. 



being the first Triton observed in the Claiborne deposit. The 

 moutii is -2 of an inch in length. 



FAMILY PURPURIFERA. 



Genus Buccinum. — Linnceus. 



B. parvum. PI. 1, fig. 17. 



B. testa sub-turrita, lasvi, polita, sub-crassa; spira acuta; anfrac- 



tibus , planulatis ; suturis impressis ; basi striata ; labro in- 



tus striato ; apertura sub-qnadrilaterah, canaliculata. 



Shell sub-tLirrited, smooth, polished, somewhat thick ; spire 



acute ; whorls , fiat ; sutures impressed ; base striated ; outer 



lip striate within ; mouth sab-quadrilateral, channelled. 



Length . Breadth -07 of an inch. 



Remarks. — In this shell the outer lip has five striae, but, as I 

 have only one specimen, I cannot determine whether this is a 

 constant character. The columella appears plicate, from the con- 

 tinuation of the strias of the base. There is nothing very re- 

 markable about this little species, although it is sufficiently mark- 

 ed to characterize it as new. 



Genus Terebra. — Lamarck. 

 T. constricta. PI. 1, fig. 18. 



T. testa subulata, attenuata, crassa, transverse striata, striis tri- 

 bus, longitudinaliter lineata; spira acuta, valde elevata ; anfracti- 



bus , planulatis; suturis impressis ; columella Ifevi ; apertura 



sub-quadrilaterali ; canale parvo, reflexo. 



Shell subulate, attenuate, thick, transversely striate, with three 

 strise, longitudinally lined ; spire very elevated, acute ; whorls 

 , flat ; sutures impressed ; columella smooth ; mouth sub- 

 quadrilateral ; channel small, reflexed. 



Length . Breadth -1 of an inch. 



Remarks. — But two specimens of this shell, and both with the 

 spire very much fractured, have come under my observation, yet 

 their shape is such as to leave no doubt in my mind that the spire 

 is acute and very attenuate, in which it resembles most Terebras. 

 It approaches T. veiiusta, Lea, but differs from it in its transverse 

 striee, its want of longitudinal ribs, and in the channel being more 

 reflexed. 



