328 NEW UNIONIDiE, MELANID^, ETC., 



abdominal sack. Palpi very small and subtriangular. Mantle very thin, thicker at 

 the edges. Branchial opening large, dark colored, with papillae on the inner edges. 

 Anal opening rather small, with very indistinct papillse. Super-anal opening very 

 small, with dark edges. Color of the mass whitish. 



GoNiOBAsis "Wheatleti. pi. 54, fig. 1. 



Testa striata, subfusiformi, subinflata, subcrassa, ochracea, vel vittata vel evittata ; spira conoidea, ad 

 apicem aliquanto plicata ; suturis irregulariter impressis ; anfractibus instar senis, fere planulatis ; 

 apertura subconstricta, ovata, intus ocbracea ; labro acuto, parum sinuoso ; columella inflexa, 

 reflexa et tortuosa. 



Shell striate, subfusiform, subinfiated, somewhat thick, ochraceous, banded or with- 

 out bands ; spire conoidal, sometimes folded at the tip ; sutures irregularly impressed ; 

 whorls about six, nearly flat; aperture ovate, somewhat constricted; ochraceous 

 within ; outer lip acute, somewhat sinuous ; columella inflected, reflected and twisted. 

 Proc. Acad. Nat. Sci. 1868, p. 151. 



Hob. — Coosa River, Alabama, Dr. Showalter. 



My cabinet and cabinets of Dr. Showalter, Mr. Wheatley and Dr. Hartman. 

 Diam. -54, Length 1-17 inch. 



Remarks. — Four specimens of this fine large species were received from Dr. 

 Showalter, one of which has four indistinct bands. It is among the larger ones from 

 the Coosa, and is somewhat like a large rough Bridgesiana than any other species I 

 know. The banded specimen is inclined to be of an olive-green color. The trans- 

 verse striae cut the longitudinal marks of growth, and on the upper part of the whorls 

 cause that part to be corrugate. Dr. Showalter mentions that this shell was found in 

 November of 1867 for the first time. The aperture is nearly one-half the length of 

 the shell. I have great pleasure in dedicating this fine species to my friend, C. M. 

 Wheatley, who is so unwearied in his efforts to promote a knowledge of our fresh- 

 water Molluscs. 



GONIOBASIS SIJIILIS, PI. 54, fig. 2. 



Testa striata, suRfusiformi, subtenui, luteo-cornea; spira brevi, ad apicem plicata; suturis impressis; 

 anfractibus instar senis, vix convexis ; apertura subgrandi, ovata, intus luteo-alba; labro acuto ; 

 columella inflexa et tortuosa. 



Shell striate, subfusiform, rather thin, yellowish-horn color ; spire short, folded at 

 the tip; sutures impressed; whorls about six, scarcely convex; aperture rather 

 large, ovate, within yellowish-white; outer lip acute; columella inflected and 

 twisted. 



Proc. Acad. Nat. Sci. 1868, p. 151. 



