182 SYSTEMATIC PALEONTOLOGY 



Description. — " Shell ovate-conic, subacute, cancellate, exhibiting a 

 granulated appearance, dark reddish-brown, or blackish, sometimes 

 tinged with olivaceous; spire shorter than the body; suture not deeply 

 impressed; beak not distinguished from the body whirl by any profound 

 depression, and not prominent ; labrum within lineated with elevated, ab- 

 breviated or interrupted lines, not incrassated, purple-black; columella 

 at base with a prominence or fold." Say, 1822. 



This species appears in the Pliocene of the Carolinas and is common 

 in the Pleistocene from Massachusetts to South Carolina. 



Length, 21 mm.; width, 13 mm. 



Occurrence. — Talbot Fobmation. Wailes Bluff near Cornfield Har- 

 bor and Langleys Bluff, St. Mary's County; Federalsburg, Caroline 

 County. 



Collections. — Maryland Geological Survey, Johns Hopkins University, 

 and U. S. National Museum. 



Family COLUMBELLIDAE. 



Genus COLUMBELLA Lamarck. 

 COLUMBELLA (ASTYRIS) LUNATA (Say). 



Plate XLIX, Figs. 5, 6. 



Nassa lunata Say, 1826, Jour. Acad. Nat. Sci. Phila., vol. v., p. 213. 

 Columbella lunata Holmes, 1859, Post-Pi Fos. S. C, pp. 74, 75, pi. xii, figs. 



5, 5a. 

 Astyris lunata Dall, 1870, Proc. Boston Soc. Nat. Hist., vol. xiii, p. 242. 

 Columbella (Asytris) lunata Dall, 1889, Bull. U. S. Nat. Mus., No. 37, p. 



118, pi. i, fig. 17. 

 Columbella (Astyris) lunata Dall, 1890, Trans. Wagner Free Inst. Sci., 



vol. iii, pt. i, p. 137. 



Description. — "Shell reddish-brown, with about six volutions; whorls 

 with two revolving lines of dilated, sublunate, whitish spots, and some- 

 times a third one at base; suture not deeply impressed; labrum dentate 

 on the inner submargin, the superior teeth more prominent; labium with 

 the plate not thickened." Say, 182G. 



