30 PROCEEDINGS OF THE ACADEMY OF [Feb., 



Dimensions. — Altitude, 12.1 mm. Maximum diameter, 6.0 mm. 

 Diameter at right angles to the maximum diameter, 5.0 mm. 



Type Locality. — Neill's Eddy Landing, 3 miles north of Cronley, 

 Columbus County, North Carolina. Waccamaw Formation. 



Observations. — The Alectrion lapontierei of Dall is quite similar 

 in outline but runs smaller, and has fewer, much narrower, and 

 more distant spirals. 



Distribution. — St. Mary's Formation. 4 miles northwest of 

 Williamston, Martin County; 1 mile west of Wilson in Hominy 

 Swamp, Wilson County, North Carolina. Yorktown Formation. 

 Yorktown, York County; 1^ miles north of Suffolk, 1 mile north- 

 east of Suffolk, and at Suffolk, | mile below the Suffolk water 

 works dam, Nansemond County, Virginia. Colerain Landing on 

 the Chowan River, Bertie County, North Carolina. Duplin 

 Formation. 2 miles below Lumberton, and 4 or 5 miles below 

 Lumberton, Robeson County, North Carolina. Muldrow's Place, 

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

 Waccamaw Formation. Neill's Eddy Landing, 3 miles north of 

 Cronley, Columbus County, North Carolina. 



Although the type of this widely distributed little species comes 

 from the Waccamaw, it occurs most commonly in the Yorktown 

 and Duplin Formations. 



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

 versity. Academy of Natural Sciences of Philadelphia. 



Anachis styliola new subspecies obsoleta. Plate II. flgs. 7, 9, 12. 



Gejieral Characters. — Shell moderately tall, varying quite widely 

 in degree of slenderness. Spire acute, attenuated. Aperture 

 sometimes less than one-third the total altitude. Whorls 8 to 10 

 in number, regularly increasing in size, minutely tabulated pos- 

 teriorly, the preceding volution, correspondingly undercut an- 

 teriorly. Early whorls of conch strongly carinated, the keel moving 

 forward from its initial position at approximately the median 

 horizontal, till, by the end of the first whorl, it directly overhangs 

 the suture and conspicuously coronates the succeeding turn, grad- 

 ually, however, becoming lower and less prominent, and usually 

 reduced to the normal plane of the spire by the end of the third 

 whorl. Suture distinct, inconspicuous; sulcus outlining the periph- 

 ery of the preceding whorl often visible behind it. 



Protoconch. — Protoconch smooth, including 1| to 2 whorls, the 

 first half turn largely immersed, the second quite strongly globose 

 posteriorly, becoming decreasingly convex anteriorly. 



