356 Monograph of the Species of 



Found by Mr. Say in Florida, and sent to me by Dr. Ra- 

 venel from Charleston, S. C, and by Dr. Foreman from Jack- 

 sonborough and Manchester, S. C, and from Savannah and 

 Whitmarsh's Island, Georgia. It seems to be a southern 

 species ; and although I have very often received shells from 

 Ohio under this name, yet no one of them has actually proved 

 to be this species. 



I have met with little or no variety in this species, and the 

 above description can scarcely be amended, except to say that 

 the teeth are compressed, and protracted for a considerable 

 distance within the aperture. The place of the two teeth or 

 folds on the outer lip is marked externally by two prolonged 

 indentations. The distinctive marks between this species and 

 P. corticaria are clearly given ; but it has a much closer re- 

 semblance, in its armature especially, to P. procera. It is, 

 however, distinguished by its less cylindrical form, its lighter 

 color, its smoother surface, its white instead of brown lip ; the 

 tooth on the transverse lip is less twisted, and that which is at 

 the base is not so remote or so transverse in position. Its 

 spire is also at least half a whorl shorter. 



PUPA SERVILIS. 



Plate XVI. fig. 14. 



Testa ovato-elongata, glabra, rufescens, umbilicata ; anfractibus quinque convexis ; 

 apertura semi-elliptica, dentibus quinque armata, quorum unus contortus postice, 

 unus ad basin, duo ad labium affixi ; labro reflexo. 



Shell elongated ; tapering to a somewhat acute apex, of a 

 pale chestnut or horn color ; whorls five and sometimes some- 

 what more, very delicately wrinkled ; suture well defined. 

 Aperture semi-oval, nearly in the axis of the shell, the trans- 

 verse portion slightly oblique, and the two extremities of the 

 lip very nearly meeting behind. Revolving under the middle 

 of the transverse lip is a contorted, lamellar tooth which arises 

 near the junction of the outer lip ; on the middle of the col- 

 umella is a large conical tooth ; at the base is a small tooth, 

 then a third large tooth, placed so as to form a regular tripod 



