1919.] NATURAL SCIENCES OF PHILADELPHIA. 23 



the spire, smoothly constricted at the base. Volutions so closely 

 appressed against each other that the suture line is undulated by 

 the costse of the preceding turn. 



Pi^otoconch.—Trotoconch. very small and smooth, twice-coiled. 

 Initial turn for the most part submerged in the succeeding volu- 

 tion. Second turn feebly inflated. Opening of conch marked 

 by the abrupt appearance of the axial sculpture. 



Sculpture.- — ^ Axial ribs 8 or 9^ to the whorl, broad and undulatory, 

 extending from the anterior margin of the fascicle to the suture 

 and, on the final volution, well down on to tL^ pillar; incrementals 

 perceptible with a hand lens. Spirals low, broad, inconspicuous 

 lirations, numbering 7 to 9 to the whorl, separated by interspaces 

 of about half their own width; fortuitous secondaries occasionally 

 intercalated; pillar threads more rounded and more prominent 

 than those behind them; fasciole well defined, feebly concave, 

 slightly corrugated by the costae, sculptured with 5 to 7 very 

 faintly impressed revolving lines and oblique incrementals. 



Aperture. — Aperture narrow, lobate, acutely angulated at the 

 posterior commissure. Outer lip gently arcuate, not sharply 

 constricted at the base of the body. Siphonal notch rather shal- 

 low, symmetrically disposed upon the fasciole. Labium excavated. 

 Pillar straight, simple. Parietal wall and pillar wash heavy. 

 Anterior canal very short, moderately broad, obtusely truncate. 



Dimensions. — Altitude, 14.0 mm. Maximum diameter, 5.0 mm. 



Tijpe Locality. — Muldrow's Place, 5 miles southeast of Mayes- 

 ville, Sumter County, South Carolina. Duplin Formation. 



Observations. — Drillia sumterensis closely approaches Mangilia 

 in delicacy of outline and ornamentation. The character of the 

 anterior canal is, however, more suggestive of Drillia. 



Distribution. — Duplin Formation. Muldrow's Place, 5 miles 

 southeast of Mayesville, Sumter County, South Carolina. 



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

 versity. Academy of Natural Sciences of Philadelphia. 



Cancellaria tabulata new species. Plate I, flg. 9. 



General Characters. — Shell rather large and heavy, conspicuously 

 scalariform. Aperture a little more than half as high as the entire 

 shell. Conchal volutions 5 in number, widely tabulated, the 

 whorls of the spire flattened laterally, the body broadly rounded 

 and abruptly constricted at the base. Suture distinct, feebly 

 impressed, undulated by the costal of the preceding volution. 



