GONIOBASIS. 327 



237. G. virgulata. Lea. 



Melania virgulata, Lea, Proc. Acad. Nat. Sai., p. 119, 18G1. 



Goniobasis virgulata, LEA, Jour. Acad. Nat. ScL, v, pt. 3, p. 223, t. 34, f. 9, March, 



1803. Obs., ix, p.4.). 

 Melania glandaria, LEA, Proc. Acad. Nat. Sci., p. 120. 1S(>1. 

 Goniobasis glandaria. Lea, Jour. Acad. Nat. Sci., v, pt. 3, p. 226, t. 34, f. 14, March, 



1863. Obs., ix, p.48. 



Description. — Shell smooth, fusiform, thick, greenish-yellow, four- 

 banded; suture irregularly and much impressed; whorls seven, 

 slightly convex, the last large; aperture long elliptical, subcon- 

 stricted, whitish within and much banded; outer lip acute, rig. 629. 

 subsinuous; columella arcuate, thickened above and below, 

 slightly canaliculate and twisted. 



Habitat. — Coosa River, Alabama; E. R. Showalter, M.D. 



Diameter, -42 ; length, '86 of an inch. 



Observations. — This is a solid species nearly an inch long, 

 and reminds one of the form of an acorn. It is near to some of the 

 forms of nebula herein described, but has not the dark maculations 

 of that shell, the four dark brown bands being distinct on the inside. 

 The aperture is half the length of the shell. The upper band is well 

 defined on the upper whorls. — Lea. 



Goniobasis virgulata. — Shell smooth, fusiform, conical, somewhat 

 thick, shining, yellowish, four-bauded ; spire conical, sharp-pointed ; 

 sutures impressed ; whorls seven, constricted above, the last bulbose ; 

 aperture rather large, somewhat elliptical, yellowish-white and very 

 p. g3Q much banded within ; outer lip sharp ; columella inflected, 

 angular at the base and canaliculate. 



Operculum ovate, spiral, dark brown, with the polar point 

 on the inner side near the base. 



Habitat. — Coosa and Tallapoosa Rivers, Alabama ; E. R. 

 Showalter, M.D. 



Diameter, -36; length, -70 of an inch. 



Observations. — This is a beautiful banded species, having the two 

 middle bands more approximate. The four bands are broad and of 

 an intense brown ; on the upper whorls a single baud only is exhib- 

 ited. On one specimen this band reaches nearly to the apical whorl, 

 in the other only to the second. Its mucronate spire and inflated 

 body-whorl remind one of Melania conica, Say, but it may be distin- 

 guished by its having a larger body-whorl and a shorter spire. The 

 aperture is nearly half the length of the shell. — Lea. 



