ANCULOSA. 385 



Jlabitat. — Holstou River, Virginia. 

 Length, h of an inch. — Ilaldeman. 



The accompanying figure is from Prof. Haldeman's Monog- 

 raphy of Leptoxis. As Mr. Lea's figure of Melania pilula is 

 precisely similar, it is not necessary to reproduce it here ; his 

 description is as follows : — 



Melania pilula. — Shell striate, subglobose, thick, darli brown; sut- 

 ures somewhat impressed; whorls convex; aperture ovate, large, 

 angular at the base, within purplish. 



Habitat. — Tennessee. 



Diameter, -34; length -43 of an inch. 



Observations. — This is a very distinct species, and is quite as glo- 

 bose as JI. subglobosa, Say. Two specimens were received, the 

 spires of which are not perfect. I should presume that Avhen per- 

 fect they would be found to have four whorls. The raised striae are 

 very distinct, and co.^sist of eighteen in these two individuals. The 

 aperture is about half the length of the shell. One specimen is dark 

 purple within the aperture. The other is bluish with a tinge of pur- 

 ple on the columella. — Lea. 



This species resembles somewhat a striate variety of dila- 

 lata. 



5. A. costata, Anthony. 



Anculotus costatus, Anthony, Bost. Jour. Nat. Hist., ill, p. 278, t. .S, f. 1, Jan., 1840. 



DeKat, Moll. N. Y., p. 102, t. 7, f. 139. Reeve, Monog. Anculotus, t. 5, f. 41. 

 Anculosii costata, Anthony, List of Shells of Cincinnati, 2d edit. Wheatlet, 



Cat. Shells U. S., p. 28. 

 Leptoxis costata, Anthony, Binney, Check List, No. 349. 

 Melania occidentalis. Lea, I'hilos. Proc, it, p. 12, Feb., 1841. Philos. Trans., viii, p. 



172, t. 5, f. 20. Obs., iii, p.lO, t. 5, f. 20. DeKay, Moll. N. Y.,p. 95. Wiieatley, 



Cat. Shells, U. S., p. 2G. Jay, Cat., 4th edit., p. 274. Binney, Check List 



No. 18t. Catloav, Conch. Nomenc, p. 188. 

 Kitocris costata. Lea, H. and A. Auams, Genera, i, p. 308. 

 Sitocris occidentalis, Lea, Ada.ms, Genera, i, p. 308. 



Description.— Shell subglobose, with a depressed, convez spire ; 

 body-whorl veutricose, with about five costai revolving Fig. 725. Fig. 726. 

 around it; color olivaceous ; aperture obovate; base 

 regularly rounded; purplish within. 



Observations. — Found on pebbly shores near the city of CiuciU' 

 nati. — Anthony. 



Melania occidetitalis. — Shell smooth, subglobose, rather thick, 



L. T. W. 8. IV. 25 



