instar novenis, convexiuaculis ; apertura parva, subrhomboidea, intus albida; 

 labro acuto, sinuoso ; columella inferne incrassata et contorta. 



Bab.— Lafayette co. and Marietta, Ga., Kev. G. White. Farland's Creek, 

 Mississippi, Dr. Spillman ; and Tenn., J. G. Anthony. 



Tbtpanostoma Estabeookji. — Testa lasvi, attenuato-conica, subtenui, cornea ; 

 spira. valde elevata, superne carinata ; suturis regulariter impressis ; anfracti- 

 bus instar denis, convexis ; apertura parva, subrhomboidea, intus albida; labro 

 acuto, subsinuoso ; columella alba et contorta. 



Hab. East Tennessee, President Estabrook and Bishop Elliott. Near Cleve- 

 land, Tenn., Prof. Christy ; and Monroe co., Tenn., J. Clark. 



Tbtpasostoma Knoxvillense. — Testa laevi, subulari, subtenui, pallido-cor- 

 nea : spira attenuato-conica, mucronata; suturis regulariter impressis ; anfracti- 

 bus denis, convexiusculis, ad apicem carinatis, ultimo subconstricto ; apertura 

 parra, subrhomboidea, intus alba; labro acuto, sinuoso; columella, inferne 

 incrassati et paulisper contorta. 



Sab. — Knoxville, Tenn., Pres. Estabrook. 



Tbtpanostoma attenuatum. — Testa laevi, subulari, subtenui, cornea ; spira 

 attenuate ; suturis impressis ; anfractibus novenis, vix convexis, ultimo parvo ; 

 apertura parva, rhomboidea, intus albida; labro acuto, valde sinuoso; colu- 

 mella vix inciassata et contorta. 



Hab.— Lafayette, Ga., Kev. G. White ; and Tenn., Dr. Hartman. 



Tbtpanostoma subulefoeme. — Testa carinata, subulari, subtenui, cornea ; 

 spira. attenuato-conica; suturi3 valde impressis; anfractibus denis, inferne 

 planulatis, superne carinatis; apertura parva, subrhomboidea, intus albida; 

 labro acuto, sinuoso ; columella paulisper incrassata et contorta. 



Hab.— Knoxville, Tenn., Prof. Troost and W. Spillman, M. D. 



Tbtpanostoma tobtdm. — Testa, substriata, conica, cornea, subcrassa ; spira 

 subobtu30-conica ; suturis valde impressis ; anfractibus septenis, planulatis ; 

 apertura subgrandi, subrhomboidea, intus albida ; labro acuto, vix sinuoso ; 

 columella valde incurvata, superne paulisper incrassata, inferne incrassata et 

 valde contorta. 



Hab. — TJchee Bar, below Columbus, Ga., J. Lewis, M. D. 



Tbtpanostoma pallidum. — Testa laevi, attenuato-conica, subcrassa, pallido- 

 cornea ; spira valde elevata ; suturis valde impressis ; anfractibus undenis, con- 

 vexiusculis, supernd subgeniculatis ; apertura parviuscula, subrhomboidea, 

 intus alba ; labro acuto, sinuoso ; columella alba, et valde contorts. 



Hab. — Niagara Falls, New York. 



