340 NEW UNIONID^, MELANID^, ETC., 



LiTHASIA PUEPUREA. PI. 54, fig, 23. 



Testa Isevi, curta, subcylindracea, subcrassa, tenebroso-purpurea ; spira brevissima ; suturis valde 

 impressis ; anfractibus instar quiuis, convexiusculis ; apertura grandi, rhomboidea, intus saturale 

 purpurea ; labro acuto, vix sinuoso ; columella impressa, superne inerassata. 



Shell smooth, short, subcylindrical, somewhat thick, dark purple ; spire very short ; 

 sutures very much impressed ; whorls about five, somewhat convex ; aperture large, 

 rhomboidal, pale purple within ; outer lip acute, slightly sinuous ; columella im- 

 pressed, thickened above. 



Proc. Acad. Nat. Sci. 1868, p. 153. 



Eab. — Cahawba River, at Centreville, Bibb County, Alabama, Dr. Showalter. 



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

 Diam. '47, Length "70 inch. 



TtemarTcs. — Dr. Showalter sent me at two different times, many j'ears since, two 

 specimens of this shell. I then thought it might be a variety of Sliowalterii (nobis). 

 Eecently I have received from him two other specimens, larger and older, which 

 satisfy me that he was right in supposing the species to be new. The largest speci- 

 men before me has little more than the last whorl perfect. The youngest has the spire 

 nearly perfect. The throat of the shell is intensely purple. This species having no 

 thickening at the base of the columella allies it closely to the genus Anculosa, but it 

 is not rounded at the base as that genus is and it is not so oblique. The aperture is 

 about two-thirds the length of the shell. 



-"to" 



LiTHASIA CURTA. PL 54, fig. 24. 



Testa granulata, curta, solida, luteo-olivacea, plerumque bifasciata ; spira brevi ; suturis irregulariter 

 impressis ; anfractibus instar quinis, planulatis ; apertura subgrandi, rhomboidea, intus albida ; 

 labro acuto, subsinuoso ; columella inferne et superne inerassata. 



Shell granulate, short, solid, yellowish-olive, usually double banded ; spire short ; 

 sutures irregularly impressed ; whorls about five, flattened ; aperture rather large, 

 rhomboidal, whitish within ; outer lip acute, somewhat sinuous ; columella thickened 

 above and below. 



Proc. Acad. Nat. Sci. 1868, p. 153. 



Hob. — North Alabama, Prof, Tuomey and Dr. Spillman, and Tuscumbia, B. Pybas. 



My cabinet and cabinets of the Academy of Natural Sciences and Mr. Wheatley. 

 Diam. '40, Length "60 inch. 



Remarhs. — This is a rather small species, which has been confounded with semi- 

 granulata, Desh. ; but it is a smaller species, has fewer granules, is not so elevated in 

 the spire and is usually more regularly banded. The specimens from Prof. Tuomey 

 have been in my collection many years as a variety of semigramdata, but specimens 

 recently received from Dr. Spillman satisfy me that the species is distinct. Curta 



