34 PROCEEDINGS OF THE ACADEMY OF [Feb., 



5 miles southeast of Mayesville, Sumter County, South Carolina. 

 The species is rare even within the apparently restricted area 

 within which it occurs. 



Collections. — U. S. National Museum. Johns Hopkins Uni- 

 versity. Academy of Natural Sciences of Pliiladelphia. 



Astyris communis new subspecies carolinensis. Plate II, fig. 11. 



General Characters. — Shell rather large for the genus, stout, 

 rudely biconic. Whorls approximately 8 in number, tapering 

 rapidly to an acute apex which is somewhat decorticated so that 

 the characters of the protoconch are obscured. Body whorl 

 between one-half and two-thirds of the total altitude, obtusely 

 angulated at the periphery excepting near the aperture where 

 it is broadly rounded and scarcely constricted. Whorls of spire 

 trapezoidal in outline. Suture impressed; edge of whorl in front 

 of it sharp, but closely appressed. 



Protoconch. — Protoconch very imperfectly preserved. 



Sculpture. — External surface unsculptured excepting for some 

 15 linear sulci upon the pillar and anterior canal. 



Aperture. — Aperture a little less than one-half the total altitude, 

 rather narrow, angulated behind. Outer lip a sinistral hook, 

 feebly emarginate posteriorly, thickened and dentate within; 

 denticles 8 in number in the type, the posterior rather smaller 

 and somewhat removed from the 7 in front of it which are equisize 

 and equispaced and extend well around the anterior curvature. 

 Columella rather sharply excavated at the base of the body, simple, 

 excepting for an obscure marginal fold. Parietal wall glazed, 

 a drop of callous deposited just in front of the posterior angle, 

 feebly rugose at the initiation of the pillar. Anterior canal straight 

 or very slightly recurved, deeply emarginate. 



Dimensions. — Altitude, 13.3 mm. Maximum diameter, 6.1 mm. 



Type Locality. — Tilly's Lake, South Carolina. Waccamaw For- 

 mation. 



Observations. — The subspecies carolinensis is isolated from the 

 communis s. s. by the absence of the minute tabulation in front 

 of the suture, and the longer and straighter anterior canal. In 

 many of the collections and check-lists, forms similar to those 

 which have been included under this subspecies are listed under 

 Astyris profundi or its subspecies minor and permagna. The 

 type of profundi was dredged in eight hundred and five fathoms. 

 The body whorl is more rounded than in any of the Tertiary indi- 



