Sab.— Tennessee, Prof. Troost and Mr. Anthony. Florence, Ala., Rev. G. 

 White, Mr. Pybas and Mr. Thornton. Cumberland River, Dr. Powell. Ohio 

 River, near the mouth, in Illinois, J. Donaldson. New Harmony, Indiana, Mr. 

 Carley and Mr. Sampson. Warrior River, Ala., Prof. Brumby. 



Teypanostoma Lewisii. — Testa, sulcata, subtenui, elevato-conica, tenebroso- 

 fusca vel cornea, vittata ; spira. attenuate ; suturis paulisper impressis ; an- 

 fractibus instar undenis, planulatis; apertura parva, subrhomboidea, intus 

 vittata ; labro acuto, paulisper sinuoso ; columella inferne paulisper incraBsata 

 et valde contorta. 



Sab. — Peoria, Illinois, J. Lewis, M. D. 



Teypanostoma mobifokmi. — Testa sulcata, subcy!indracea,solida, uno- vittata, 

 cornea, spira obtuse conicu ; suturis impressis ; anfractibus instar novenis, 

 impressis, canaliculars ; apertura parviuscula, rhombica, intus alba et uno- 

 vittata ; labro acuto, valde sinuoso ; columella inferne incrassata et valde 

 contorta. 



Sab. — Oostenaula River, near Rome, Ga., Rev. G. White. Tenn. River, Dr. 

 Spillman. Tuscumbia, Ala. B. Pybas. 



Teypanostoma vikide. — Testa subsulcata, subcrassa, subfu9iformi, olivacea ; 

 spira obtuse conica ; suturis valde impressis ; anfractibus septenis, convexis, 

 ultimo subcanaliculato ; apertura subgrandi, rhomboidea, intus vel purpurea 

 vel albida ; labro acuto, sinuoso ; columella inferne incrassata et paulisper 

 contorta. 



Sab. — Tennessee, Prof. Troost. 



Teypanostoma Showalteeii. — Testa, striata, interdum lsevi, valde exerta, 

 craesa, subcylindracea, vel cornea vel fusca, interdum inferne vittata ; spira 

 valde elevata; suturis valde impressis; anfractibus novenis, subpianulatis ; 

 apertura parva, rhomboidea, intus vel albida vel salmonia ; labro acuto, parnm 

 sinuoso ; columella inferne incrassata et valde contorta. 



Sab. — Cahawba River, Ala., E. R. Showalter, M. D. Tuscaloosa, Ala., Dr. 

 Budd. Oostenaula River, Ga., Rev. G. White and Bishop Elliott. 



Teypanostoma Anthonyi. — Testa, rugoso-striata, pyramidata, crassa, luteo- 

 olivacea ; spira elevata ; suturis rugoso-impressis ; anfractibus instar novenis. 

 planulatis ; apertura subgrandi, rhomboidea, intus alba, ; labro acuto, sinuoso ; 

 columella inferne incrassata et valde contorts. 



Sab. — Tennessee, J. G. Anthony. Warrior River and Yellowleaf Creek, Ala., 

 Dr. Showalter. Fox River, Indiana ; J. Sampson. 



