404 pSoceedings of the academy of [1887. 



Cancellaria sp.? 

 Marginella sp. ? 

 Pleurotoma nov. sp. 



Natica hemicrypta, Gabb. Jouru. A. N. S. (2d ser.), IV, p. 375. 

 Nat'ica cafenoidesf Wood. Crag. Moll., p. 141. 

 Turbo eboreus, Wagner. Joiirn. A. N. S VIII, p. 52, 

 Carinorbis (Delphinula) globulus, H. C. Lea. Trans. Am. Phil. Soc, 

 (D. lyraf Conrad.) [IX, p. 262- 



Turritella cequistriata, Conr. Proc. A. N". S., 14, p. 584. 

 Turritella Cumberlandia, Conr. Proc. A. N. S., 14, p. 584. 

 Turritella secta, Conr. Proc. A. N. S., VII, p. 268. 

 Turritella plebeia, Say. Journ. A. N. S., IV, p. 125. 

 Trochita centralis, Conr. A. J. Science, XLI, p. 348. 

 Crucibulum costatum, Say. Journ. A. N. S., IV, p. 132. 

 Crepidula fornicata, Say. Journ. A. N. S., II, p. 225. 

 Crepidula plana f Say. Journ. A. N. S., II, p. 226. 

 Fissurella Griscomi, Conr. Mioc. Foss., p. 78. 



The references to descriptions do not necessarily indicate first 

 description. 



Notes on New and Old Species. 

 Murex Shilohensis. nov. sp. 



Whorls about seven, angular, flattened on the shoulder, which is 

 crossed diagonally by the variceal ridges ; varices about eight on 

 the body-whorl, sub-equal, spinosely elevated on the shoulder angu- 

 lation, and crossed by four sub-equal revolving ridges, which appear 

 double on the crests of the varices ; only two such ridges on the 

 whorls above the body-whorl. 



Aperture somewhat more than half the length of shell, key-hole 

 shaped, with the canal broadly deflected. Length nearly "75 inch. 



A single specimen from Ayres' pits, near Shiloh, in the possession 

 of Miss Emma Walter, of Philadelj)hia. 

 Pleurotoma pseudeburnea. nov. sp. 



Spire elevated, of about ten volutions; apex papillate; whorls 

 convex, porcellanous, strongly ribbed, somewhat impressed on the 

 shoulder ; ribs numerous, deflected, those of the several whorls al- 

 ternating in position. No revolving lines. 



Aperture about one-third the length of shell ; canal slightly de- 

 flected ; columellar lip well defined. 



Length, slightly exceeding a half-inch. 



