242 NEW MELANIDvE OF THE UNITED STATES. 



GONIOBASIS BLANDA. PI. 35, fig. 44. 



Testa plicata, obtuse fusifornii, superne obtuse conica, subtenui, tenebroso-cornea ; spira valde obtusa ; 

 sutuvis impressis ; anfractibus quinis, superne planulatis, ultimo grandi et subangulato ; apertura 

 subgrandi, elliptica, intus luteo-alba ; labro acuto ; columella incrassata, inflecta, inferne subangulata. 



Shell plicate, obtusely fusiform, obtusely conical above, rather thin, dark horn- 

 color; spire very obtuse; sutures impressed; whorls five, flattened above, the last 

 large and subangular ; aperture rather large, elliptical, yellowish white within ; outer 

 lip acute ; columella thickened, inflected, subangular below. 

 Melania blanda, Proe. Acad. Nat. Sci., 1861, p. 122. 



Hob. — Yellowleaf Creek, Alabama, E. R. Showalter, M. D. 



My cabinet and cabinet of Dr. Showalter. 

 Diam. -37, Length -73 inch. 



Remarks. — A single specimen only was received from Dr. Showalter. I think it 

 is not entirely mature. The folds are low, somewhat distant and vertical. The 

 aperture is about half the length of the shell. In outline it is near to IAthasia 

 Duttoniana, which I described as a Melania, but it has not the callus above and below 

 on the columella, which constitute that genus, nor has it any tubercles, being covered 

 above by folds. 



GONIOBASIS VESICULA. PI. 35, fig. 45. 



Testa obsolete plicata, elliptica, lute8,, immaculata, subtenui ; spira brevissima, obtusa ; suturis subim- 

 pressis ; anfractibus ternis, subconvexis ;• apertura grandi, regulariter ovata, intus dilute-salmonia; 

 labro acuto ; columella incrassata, incurvata, ad basim rotundata. 



Shell obscurely folded, elliptical, yellow, without spots, rather thin ; spire very 

 short and obtuse ; sutures rather impressed ; whorls three, somewhat convex ; aper- 

 ture large, regularly ovate, pale salmon within ; outer lip sharp ; columella thickened, 

 incurved, rounded at the base. 



Melania vedcula, Proc. Acad. Nat. Sci., 1861, p. 118. 



Eab. — Alabama, E. R. Showalter, M. D. 



My cabinet and cabinet of Dr. Showalter. 

 Diam. -18, Length -37 inch. 



Remarte. — A single specimen of this very small species was found among others 

 of a different species from Dr. Showalter. It is a small, regularly oval, inflated 

 species. In this specimen there is a disposition on the upper part of the whorls to 

 plication, and this produces obscure spots round this part of the whorls. Other 

 specimens may not have this character. The aperture is very large, being two-thirds 

 the length of the shell. It is nearly allied to Melania ( Goniobasis) auriculaformis 

 (nobis), but is not so large and has a wider aperture, which is not so elongate. The 

 color is nearly the same, but the tint is rather brighter. It cannot be confounded 



