256 LAND AND FRESH-WATER SHELLS OF N. A. [pART IV. 



outer lip acute, somewhat sinuous ; columella white, beut in and 

 somewhat twisted. 

 Habitat.— Ohio ; J. P. Kirtland, M.D. 

 Diameter, -28 ; length, -Co of an inch. 



Observations. — A single specimen was received many years since 

 from Dr. Kirtland with Melania (Goniobasis) depygis, Say, but while 

 it agrees with it in color and size, it is quite different in the 

 body-whorl, and in the form of the aperture. The aperture 

 is very much like Lithasia, and is slightly thickened above on 

 the columella, but there is neither a channel nor callus below. 

 In the whole outline and form of the aperture it is very 

 like Lithasia Downiei (nobis), but it is a much smaller shell, 

 a much lighter color, has no tubercles and has no channel at the base. 

 It is among the few species which are impressed on the body-whorl, 

 but it is not so much so as G. injormis, herein described, and is a 

 larger and stouter species. The aperture is not quite half the length 

 of the shell. Dr. Kirtland did not state from what part of Ohio it 

 came. — Lea. 



151. G. infantula, Lea. 



Goniobasis infantula^ Proc. Acad. Nat. Sci., May, 1S63. Obs., xi, p. 91, t. 23, /. 39. 



Description. — Shell smooth, fusiform, dark horn-color, much banded; 

 spire short ; sutures slightly impressed ; whorls five, flattened above ; 

 aperture rather large, ovate, banded within; outer lip acute, slightly j 

 sinuous ; columella purple, thickened and twisted. 



Operculum ovate, reddish-brown, rather thin, with the polar point- 

 near the base on the loft edge. 



Habitat. — Falls of the Ohio at Louisville, Ky. ; W. IL DeCamp, M.D. 



Diameter, -20 ; length, -38 of an inch. 



Observations. — This is a pretty little species, usually Avith four well 



marked, rather broad, brown bands. In one of the six speci- 



' Fig. 4966.« 

 mens before me thei-e are only three indistinct bands. It is fik 



closely allied to Melania (Goniobasis) cognata, Anthony, and bJk 

 near to Georgiana (nobis). It differs from cognata in being ^^ 

 more drawn out in the spire and having less inflation of the body- 

 whorl. The aperture is about one-half the length of the shell. — Lea. 



