42 PROCEEDINGS OF THE ACADEMY OF [Feb., 



Aperture. — Aperture holostomous, sub-quadrate. Outer lip 

 straight. Inner lip strongly arcuate. 



Dimensions. — Altitude, 24.0 mm. Maximum diameter, 6.5 mm. 



Type Locality. — Natural Well, Duplin County, North Carolina. 

 Duplin Formation. 



Observations. — Turritella duplinensis bears a strong resemblance 

 to the laterally compressed race of Turritella subannulata 

 Heilprin. It is doubtless closely related and may be a precursor. 

 It also suggests Turritella cequistriata Conrad in general outline 

 and type of sculpture, although the latter is keeled at the median 

 line of the volution, the lirations are broader, more nearly equal 

 in size, and separated by linear interspaces. 



In the single adult form in the U. S. National Museum Collec- 

 tion from the Cape Fear River, the systems have broken down 

 and the lirse are numerous, equisized, irregularly alternating, 

 and tending to concentrate on the anterior portion of the whorl. 

 This suggests the possible identity with Turritella carolinensis, 

 vaguely described and badly figured by Conrad in 1875.* It is 

 probable, however, that the latter is characterized by a rela- 

 tively broader base, and a consistently more uniform spiral sculp- 

 ture. Conrad's type is not available, unfortunately, and it seems 

 unwise to attempt to establish definite relationships between two 

 species, one of which is so ill defined. 



Distribution. — Duplin Formation. Natural Well, 1| miles north 

 of Magnolia, Duplin County, North Carolina. Muldrow's Place, 

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

 Porter's Landing, Savannah River, Georgia. Waccamaw Forma- 

 tion. Neill's Eddy Landing, 3 miles north of Cronley, Columbus 

 County, North Carolina. 



Turritella duplinensis is the most abundant and characteristic 

 species of the Formation from which it has received its name. 



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

 versity. Academy of Natural Sciences of Philadelphia. 



Liotia (Arene) major new species. Plate IV, flgs. 1. 3. 



General Characters. — Shell nacreous within. Large for the genus. 

 Scalar-turbinate in outline. Spire moderately elevated, scalari- 

 form. Body whorl well rounded, though pseudo-angulated by 

 the prominence and position of the spirals. Whorls 6 in number, 



*Conrad in Kerr, 1875, Rept. Geol. Survey, North Carolina, Appendix A, 

 p. 22, pi. iv, fig. 8. 



