GOKIOBASIS. 271 



cylindrical, and much less ponderous ; the whorls are also more con- 

 vex, and the sutures more distinctly impressed ; it is altogether a 

 broader and thinner shell. Some specimens are finely banded, the 

 lower band being often concealed partially by the revolutions of the 

 succeeding whorl. The body-whorl has three bands in the variety, 

 and these also appear within the aperture. All the specimens before 

 me, some flfty in number, are more or less decollate, and only two or 

 three are banded. — Anthony. 



Mdania perfusra. — Shell smooth, conical, rather thick, dark brown ; 

 spire exserted ; sutures linear; whorls rather flattened ; yi„. 500. 

 aperture large, inflated, ovate, within pale purple. 

 Habitat. — Calf-killer Creek, Tennessee. 

 Diameter, -50 of an inch ; length, 1 inch. 

 Observations. — A single specimen, with the spire trun- 

 cate, is before me. The lower portion is perfect. The 

 apex being destroyed the number of whoi-ls cannot be ascertained. 

 The aperture is, I presume, rather more than one-third the length 

 of the shell. The lower part of the margin protrudes considerably. 

 It seems to be nearly allied to M. cbcnum (nobis), but is a larger shell, 

 more inflated, and has a larger aperture, being less ellip!;ical. — Lea. 

 Melania incurta. — Shell somewhat pyramidally conical, yellow- 

 Fig. 521. ish-olive; whorls smooth, slopingly contracted round 

 the upper part, then rounded; aperture ovate; columella 

 reflected, slightly siuuated at the base. 



(Anthony, manuscript in Museum Cuming). 

 Habitat. — United States. 



Observations. — All I can say of this shell is, that it is 

 in Mr. Cuming's cabinet with the above name in manu- 

 script, alleged to have been received from Mr. Anthony. — licei-e. 



An extensive suite of specimens, whicli I have had before 

 me, through the kindness of Messrs. Gould and Haldeman 

 proves the identity of the above described species, the vari- 

 ation of form being very great. 



171. Gr. castanea, Lka. 



Melania castanea, Lea, Philos. Proc, ii, p. 11. Philos. Trans., viii, p. 1G4. t. .'5, f. 2. 

 01)s.. iii. i>. 2. DeKav, Moll. X. Y., p. !i2. Tkoost. Cat. Shells Teiineseec. 

 WheatleV, Cat. Shells U.S., p. 21. ReEVE, Moiiog. Mt-laiiia, sp. 337. 



Description. — Shell smooth, club-shaped, rather thin, dark brown; 



