GONIOBASIS. 317 



yellow, smooth epidermis. There are four specimens before me, one 

 being quite youug, the others mature or nearly so. One has four 

 somewhat obscure, broad, purplish bands, better defined within. 

 The aperture is about half the length of the shell. In outline it 

 approaches Lithasia Florentiana and L. fuUginosa, both which were 

 described by me as Melanicc, but it is largei', more yellow, has a 

 higher spire and is not so thickened on the columella as either of 

 those species. — Lea. 



226. G. ambusta, Anthony. 



Melania ambusta. Anthony. Ann. Lye. Xat. Hist., vi, p. 94, t. 2, f. 13, 185i. Binney, 

 Cheek List, No. 12. Bkot, List, p. 39. Reeve, Mouog. Melauia, sp. 352. 



Description. — Shell ovate, rather thin, smooth, chocolate-colored ; 

 spire obtusely elevated; whorls about six, subconvcx; body- whorl 

 large, substriate ; sutures moderately impressed ; aperture large, nar- 

 row ovate, reddish within; columella indented, with a broad, not 

 very remarkable sinus at base. 



Habitat. — Alabama. 



Diameter, --18 of an inch (12 millim.) ; length, 1 inch (26 millira.). 

 Length of aperture, -48 (12 millim.); breadth of aperture, -23 of an 

 inch (G millim.). 



Observations. — In form not unlike M. olivula, Conrad, but its very 

 peculiar plain, dark chocolate-colored epidermis and Fig. cio. 

 sombre interior will at once distinguish it from all 

 other species. A f(!W, irregular stride are visible on 

 the body-whorl, and a very obscure, narrow baud 

 may be observed near the sutures ; in all of the three 

 specimens before me the columella is slightly reflected 

 over u narrow, umbilical opening near the base, which 

 appears almost disconnected from the outer lip as in Achatina. The 

 burnt appearance of tlie shell has suggested its specific name. — 

 Anthony. 



Figured from jNLr. Authoiiy's type specimen. 



