GONIOBASIS. 247 



body-whorl, and seem under the microscope to be slightly raised on 

 the surface. The second specimen is horn-color and has no bands. 

 In outline this species is closely allied to Malania (Goniobasis) Xick- 

 liniana (nobis), but is not so pointed at the apex, is not so inflated in 

 the body-whorl, and differs in color. The aperture is quite half the 

 length of the shell.— Lea. 



142. G. depygis, Say. 



Melanin depygia, SAY, New Harmony Disseminator, p. 291. SAT's Reprint, p. 19. 

 Am. Couchology, Part 1, t. 8, f. 1, 5. Bixney'S Reprint, pp. 145 and \'>1, t. 8. 

 Hix.VEY, Check List, No. 87. Laphaji, Cat. Moll. Wisconsin. Kirtland, Am. 

 Jour. Sci. Kirtland, Rep. Zool., Ohio, p. 174. Shaffer, Catalogue. Hig- 

 Gixs, Catalogue. Anthony, List, 1st and 2d edit. Sager, Kept. Michigan 

 Moll., p. 15. Wheatley, Cat. Shells U.S., p. 25. DeKay, Moll. N. Y., p. S9, t. 

 7, f. 135. Stimfson, Shells of New England, p. 32. Jay, Cr.t. Shells, 4th edit., 

 p. 273. Adams, Am. Jour. Sci., xl, p. 300. Adams, Thompson's Hist. Vermont, 

 p. 152. Catlow, Conch. Nomenc, p. ISC. Brot, Li^t. p. 37. Deshayes, La- 

 mark, Anim. sans. Vert., viii, p. 441. Reeve, Monog. Melania, sp. 373. 



Potadoma depygis, Say, Adams, Genera i, p. 298. 



Melania occulta, Anthony, Proc. Acad. Nat. Sci., p. 5, Feb., 1800. Binney, Check 

 List, No. 185. Brot, List, p. 38. Reeve, Monog. Melania, sp. 254. 



Description. — Shell oblong, conic-ovate, not remarkably thickened; 

 spire as long as the aperture, or rather longer, often much eroded, 

 with a broad, revolving, rufous line near the suture, occupying a con- 

 siderable portion of the surface; whorls about five, ^j^^g^^ Pig 4g2_ 

 hardly rounded ; suture moderately impressed ; body- 

 whorl yellowish, with two rufous, revolving lines 

 equidistant from the suture, base and each other, the 

 superior one broader, and its locality a little flatter 

 than the general curvature; aperture ovate, acute above, moderately 

 dilated; labium with calcareous deposit, particularly above; labrum 

 not projecting near the base, nor arquated near its junction with the 

 second volution ; base regularly rounded. 



Observations.— I found this species, in great abundance, on the 

 rocky flats at the Falls of the Ohio, where they were left by the 

 subsiding of the river, in company with numerous other shells. In 

 old specimens the spire is very much eroded, exhibiting a white, irreg- 

 ular surface. It varies a little in color, and a few occurred, of which 

 the color is fuscous, the bands being obsolete. — Say. 



The following description is founded on elongated speci- 

 raciis of dejyjfjis, of which it is undoubtedly a syiionynie. 



Melania occulta.— Shell conic, smooth, rather thin; color lemon- 



