GONIOBASIS. 267 



rhomboidal, whitish within ; outer lip acute, sinuous ; columella some- 

 what bent in and thickened below. 



Operculum subrotund, thin, light brown, with the polar point on the 

 left near the edge. 



Habitat. — Little Uchce River, below Columbus, Ga. ; G. Hallenbeck. 



Diameter, -30; length, •74 of an inch. 



Observations. — Nearly a doxen of this species were mixed up with 

 the Ucheensis, herein described. It is closely allied, but may -pin- sn 

 be distinguished by the form of the aperture, which is much 

 more rhombic. It is also of a lighter color, and the outer lip 

 is more sinuous'. The aperture is more than one-third the 

 length of the shell. — Lea. 



The following is a still 3'ounger form of indlescens : — 



Goniobasis parva. — Shell smooth, conical, thin, horn-color, without 

 bands; spire somewhat raised, sharp-pointed; sutures impressed; 

 Fig. 51-2. whorls seven, flattened; aperture rather small, whitish with- 

 in, subrhomboidal ; outer lip acute and sinuous; columella 

 bent in and somewhat thickened. 



Habitat. — Georgia; Right Eev. Stephen Elliott. 

 Diameter, '27 ; length, -GG of an inch. 

 Observations. — This is a small species of which I received only 

 three specimens, neither of them entirelj^ perfect. It is very near to 

 Melania (Goniobasis) Icevis (nobis), but it is more attenuate, having a 

 higher spire and rather smaller aperture. The aperture is about two- 

 fifths the length of the shell. — Lea. 



167. G. Anthonyi, Lea. 



Goniobasis Anthonyi. LEA, Proc. Acad. Xat. Sci., p. 304. 1802. Joui-ii. Acad. Xat. 

 Sci., V, pt. 3, p. 303, t. 37, f. 140, March, 1SU3. Obs., ix, p. li,"). 



Description. — Shell smooth, obtusely conical, rather thin, shining, 

 dark chestnut brown, without bands ; spire obtuse ; sutures im- 

 pressed; whorls about six, somewhat convex; aperture rather large, 

 clongately rhombic, brownish within ; outer lip acute, white towards 

 the margin and slightly thickened ; columella bent in and very nmch 

 twisted. 



Habitat. — Tennessee; J. G. Anthony. 



Diameter, -33 ; length, -77 of an inch. 



