334 NEW UNIONID^, MELANID^, ETC., 



Bridgesiana (nobis), but it differs entirely in having folds and stri^, which are 

 peculiar. The aperture is more than ene-third the length of the shell. 



GONIOBASIS CONTIGUA. PI. 54, fig. 12. 



Testa Itevi, subfusiformi, tenui, tenebroso-oliva, evittata ; spira subelevata ; suturis impressis ; anfracti- 

 bus instar quinis, convexiusculis ; apertura grandi, subrhombica, intus albida ; labro acuto, 

 sinuoso ; columella vix incrassata et valde contorta. 



Shell smooth, subfusiform, thin, dark olive, without bands ; spire somewhat raised ; 

 sutures impressed ; whorls about five, somewhat convex ; aperture large, subrhom- 

 boidal, whitish within; outer lip acute, sinuous; columella scarcely thickened and 

 very much twisted. 



Proc. Acad. Nat. Sci. 1868, p. 152. 



Hob. — Connesauga Creek, Whitfield County, Georgia, Major T. C. Downie. 



My cabinet. 

 Diam. -37, Length '80 inch. 



Remarlcs. — Unfortunately only a single specimen was received, and that imperfect 

 in the upper whorls. It is in outline nearest to Chr'istyi (nobis), but differs in not 

 being plicate or granose and is a thinner shell, with a sharp angle at the base. 

 There are a few obscure strise on the middle and lower part of the last whorl. The 

 aperture is about half the length of the shell. 



GONIOBASIS MURRATENSIS. PI. 54, fig. 13. 



Testa Isevi, fusiformi, inflata, subtenui, tenebroso-cornea, evittata; spira conoidea, ad apicem plicata ; 

 suturis aliquanto impressis : anfractibus instar senis, subplanulatis ; apertura magna, subrhom- 

 boidea, intus luteola ; labro acuto, parum siuuoso; columella inflexa et tortuosa. 



Shell smooth, fusiform, inflated, rather thin, dark horn color, without bands; spire 

 conoidal, folded at the tip ; sutures somewhat impressed ; whorls about six, rather 

 flattened ; aperture large, subrhomboidal, yellowish within ; outer lip acute, some- 

 what sinuous ; columella inflected and twisted. 

 Proc. Acad. Nat. Sci. 1868, p. 152. 



Hob. — Swamp Creek, Whitfield County, Georgia, Major T. C. Downie. 



My cabinet and cabinets of Academy of Natural Sciences, Mr. Wheatley and Dr. 

 Hartman. 

 Diam. -48, Length -95 inch. 



RemarJcs. — Quite a number of this species were sent to me by Major Downie. 

 Some of them are darker in the epidermis than others. In regard to the folds which 

 appear on nearly all the specimens in the younger stage, they are in some of them 

 quite well pronounced as low as the third or fourth whorl. This species has a strong 



