308 NEW MELANIDvE OF THE UNITED STATES. 



Bab. — Spartanburg District, South Carolina, Prof. L. Vanuxem ; Marietta, Ohio, 

 Dr. Hildreth ; Wabash River, Indiana, II. C. Grosvenor. 



My cabinet and cabinets of Dr. Hildreth and Mr. Grosvenor. 

 Diam. "23. Length - 54 inch. 



Bemarhs. — I have seven specimens from Spartanburg, seven from Marietta and 

 two from the Wabash. This small graceful species has a wide geographical distribution 

 I can see very little difference between the specimens of the different habitats. The 

 two from the Wabash are very much smaller and thinner, and maybe much younger, 

 but they differ in having a purplish columella which is not observable in the others. 

 One of them has a remarkable row of brown spots under the sutures on the body 

 whorl. The other is without spots or bands. Usually this species has two bands ; 

 six of the seven from Marietta are two-banded. Of the seven from Spartanburg two 

 only are double-banded. The others are without bands.. The species is very nearly 

 allied to Melania (Goniobasis) ovoidea (nobis), but it is more elongate and the aperture 

 is less effuse. The aperture is not quite half the length of the shell. 



Goniobasis auricoma. PI. 37, fig. 148. 



Testa lsevi, fusiformi, subtenui, mellea, vittata. ; spira valde obtusa ; suturis linearibus ; anfractibus 

 quinis, vis convexis ; apertura pergrandi, subrhomboidea, intus flavesoente ; labro acuto, vix sinuoso ; 

 columella ineurva, parum incrassata.. 



Shell smooth, fusiform, rather thin, honey-yellow, banded; spire very obtuse ; su- 

 tures linear ; whorls five, scarcely convex ; aperture very large, subrhomboidal, yellow- 

 ish within ; outer lip acute, scarcely sinuous ; columella bent in and slightly thickened. 

 Proc. Acad. Nat. Sci., 1862, p. 265. 



Hab. — Tennessee River, Wm. Spillman, M. D. 



My cabinet and cabinet of Dr. Spillman. 

 Diam. -25, Length -46 inch. 



Remarks. — A single specimen only of this little species was received among a large 

 number of mollusca from Dr. Spillman. It reminds one of Melania (Goniobasis) 

 carneola, Anth., but it is a large and more robust species, and has not the plica? of 

 that species. It has also affinities to Melania ( Goniobasis) fusiformis (nobis), but 

 differs in color, has a higher spire and a less incurved columella. The specimen of 

 auricoma before me has four bands, the three lower ones are broad, equidistant and 

 not very distinct. The upper one is more distant and very indistinct. Under the 

 microscope may be observed in this specimen numerous, very minute, impressed re- 

 volving lines. The aperture is little more than half the length of the shell. 



Goniobasis Georgiana. PL 37, fig. 149. 



Testa, lsevi, fusiformi, inflata, subcrassa, lutea, fulgida, vittata ; spira valde obtusa ; suturis impressis ; 

 anfractibus quinis, convexis ; apertura grandi, subrbomboidea, intus albida et vittata ; labro acuto. 

 recto; columella ineurva. incrassata, parum contorta. 



