CHIEFLY OF THE UNITED STATES. 339 



Hah. — Coosa Eiver, Alabama, Dr. Showalter. 



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

 Diam. -32, Length -83 inch. 



Remarks.— Mv. Wheatley received three specimens from Dr. Showalter, which he 

 kindly sent to me. In outline it is almost identical with mucronatum (nobis), but 

 differs in the form of the channel, being not quite so much recurved at the base. It 

 also differs entirely in color, being rubiginose, while mucronatum is of a pale horn 

 color. The upper whorls are sharply carinate and the lower whorl is obtusely 

 angular on the middle. One of the three specimens before me has two obscure bands, 

 the others are without bands. The aperture is not quite one-third the length of the 

 shell. I have great pleasure in naming this after my friend C. M. Wheatley, Esq., 

 who has done so much for this branch of Natural History, and to whom I am 

 indebted for the specimens. 



Trtpaxostoma terebrale. pi. 54, fig. 22. 



Testa Ifevi, pyramidata, tenui, olivacea, vel vittata vel evittata ; spira valde exserta ; suturis valde 

 impressis ; anfractibus instar duodenis, planulatis, ad apicem carinatis ; apertura parviuscula, 

 rhomboidea, intus albida vel vittata ; labro acuto, sinuoso ; columella impressa et valde contorta. 



Shell smooth, pyramidal, thin, olivaceous, banded or not banded ; spire very much 

 exserted ; sutures very much impressed ; whorls about twelve, flattened, carinate at 

 the tip ; aperture rather small, rhomboidal, whitish within or banded ; outer lip 

 acute, sinuous ; columella impressed and very much twisted. 

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



Hah. — Jackson County, Alabama, W. Spillman. 



My cabinet. 

 Diam, 44, Length 1-40 inch, 



Remarks. — One adult and four younger specimens were received from Dr. Spill- 

 man, All the specimens are thin and light. Two are without bands, the other 

 three have five to seven bands, which are strong in color in the inside. These fine 

 specimens differ very much in appearance, some being more carinate than others and 

 some being without bands. The channel at the base is remarkably wide. In outline 

 it is allied to M. {Tt'y.) ehngata (nobis), but more closely to M. {Try.) Brwnhyi (nobis). 

 It is not so solid and smooth as the former, nor is it striate and dark colored like the 

 latter. Only one has the apex whole, but this shows that the number of whorls 

 must be at least twelve. The angle of the body whorl on one specimen is quite 

 sharp. The aperture is not quite one-fourth the length of the shell, 



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