NEW MELANIDtE OF THE UNITED STATES. 285 



Tetpanostoma Teoostii. PI. 36, fig. 107. 



Testa carinata, conoidei,, valde inflata, vel luteo-eornea vel viridescente, vel vittata vel evittata ; spirt ele- 

 vata; suturis valde et irregulariter impressis ; anfraetibus instar novenis, subinipressis, interdum ca- 

 naliculars ; aperturt grandi, rhomboideS,, intus albida, interdum vittata: labro acuto, simioso ; colu- 

 mella inferne incrassata et valde contorts 



Shell carinate, conical, very much inflated, yellowish horn-color or greenish, banded 

 or without bands; sutures irregularly and very much impressed; whorls about 

 nine, rather impressed, sometimes channelled ; aperture large, rhomboidal, whitish 

 and sometimes banded within ; outer lip acute, sinuous ; columella thickened below 

 and very much twisted. 



Proc. Acad. Nat. Sci., 1862, p. 171. 



Eab. — Tennessee, Prof. G. Troost ; Florence, Alabama, Rev. G. White ; Oostenaula 

 River, Georgia, Bishop Elliott, and Fox River, near New Harmony, Indiana, J. Sampson. 



My cabinet and cabinets of Bishop Elliott and Mr. Sampson. 

 Diam, -64. Length 1-29 inch. 



Remarks. — I have five specimens before me ; that, from the late Prof. Troost (after 

 whom I have great pleasure in naming it,) I have had for a long time. It is one of the 

 the largest species we have in the United States. It is perhaps nearest to Melauia ( Try- 

 panostoma) canaliculata, Say. It is, however, more inflated, the aperture is larger and 

 the columella more extended. All the specimens are not channelled, but all are more 

 or less carinate at the periphery. Two of the specimens are obscurely banded inside, 

 and one very much banded inside and out. The old specimens are thickened inside the 

 edge of the outer lip. The aperture is more than one-third the length of the shell. 



Teypanostoma Claekii. PI. 36, fig. 108. 



Testa, obtuse carinata, conica. subcrassa, tenebroso-oliva ; spira elevata ; suturis valde impressis ; anfraetibus 

 instar octonis, planulatis ; apertura parviuscula, rliomboidea, intiis albida ; labro acuto, sinuoso : colu- 

 mella alba et contorta. 



Shell obtusely carinate, conical, rather thick, dark olive ; spire raised ; sutures very 

 much impressed ; whorls about eight, flattened ; aperture rather small, rhomboidal. 

 within whitish ; outer lip acute, sinuous ; columella white and twisted. 



Operculum ovate, dark brown, with the polar point near the basal margin. 

 Proc. Acad. Nat. Sci., 1862, p. 171. 



Hal. — French-broad and Tellico Creeks, Tennessee, J. Clark and Prof. Christy ; 

 Floi-ence, Alabama, Rev. G. White ; Noxubee River Mississippi, Dr. Spillman ; Clinch 

 River, Tennessee, Dr. Warder, and Coosa, Cahawba and Alabama Rivers, Alabama. 

 Dr. Showalter. 



My cabinet and cabinets of Mr. White, and Drs. Spillman and Showalter. 

 Diam. -46, Length 1-13 inch 



Remarks. — This species has the color of Spillmanii, herein described, but it is a 



73 



