Trypanostoma striatum. — Testa striata, subulari, subtenui, cornea ; spira 

 elevata ; suturis impressis ; anfractibus 'instar octonis, convexiusculis, ultimo 

 parviusculo ; apertura parva, subrhomboidea, intus albida; labro acuto, valde 

 sinuoso, expanso ; columella paulisper incrassata et valde sinuosa. 



Bab. — Florence, Ala., B. Pybas. 



Trypanostoma Hartmanii. — Testa lasvi, interdum obsolete canaliculata, solida, 

 virente vel rufo-fuscescente, regulariter conica, vittata vel evittata ; spira pyra- 

 midata. ; suturis regulariter impressis ; anfractibus instar novenis, convexius- 

 culis ; apertura parva, rhomboidea, intus vel alba vel salmoniu ; labro acuto, 

 sinuoso ; columella inferne incrassata et valde contorta. 



Bab. — Cahawba and Coosa Rivers, Dr. Showalter. Warrior River, Ala- 

 bama, Dr. Budd. Knoxville, J. Clark. Tenn. River, Ala., Dr. Spillman. 



Trypanostoma Jayi. — Testa lsevi, subpupoidea, crassa, nitida, rufo-fusca ; 

 spira obtuso-conica. ; suturis valde impressis, anfractibus octonis, subtumidis, 

 ultimo subgrandi; apertura parva, rhomboidea, subangusta, intus pallido-fusca; 

 labro acuto, sinuoso ; columella inferne incrassata et contorta. 



Hah. — , Alabama? J. C. Jay, M. D. 



Trypanostoma Spillmanh. — Testa lasvi, regulariter conica, tenebroso-oliva ; 

 spira elevata ; suturis regulariter impressis ; anfractibus instar novenis, planu- 

 latis ; apertura parviuscula, rhomboidea, intus albida, interdum vittata ; labro 

 acuto, sinuoso ; columella alba et valde contorta. 



Sab. — Noxubee River, Miss., W. Spillman, M. D. ; and Tenn., J. Clark. 



Trypanostoma Christyi. — Testa laevi, elevato-conica, crassiuscula, cornea, 

 raro vittata ; spira. valde elevata ; suturis regulariter impressis ; anfractibus 

 instar denis, parum convexis ; apertura parva, subrhomboidea, intus albida ; 

 labro acuto, sinuoso ; columella alba et contorta. 



Bab. — Cane Creek, Tenn., Prof. D. Christy. 



Trypanostoma labiatdm. — Testa laevi, acuto-conica, subcrassa, nitida, virido- 

 cornea ; spiia attenuate, mucronata ; suturis regulariter impressis ; anfractibus 

 instar denis, convexiusculis, ad apicem carinatis, ultimo subgrandi; apertura 

 parviuscula, rhomboidea, intus albida ; labro acuto, juxta marginem incrassato, 

 valde dilatato, valde sinuoso ; columella albida, inferne incrassata et valde* 

 contorta. 



Bab. — Big Miami River, Ohio, J. Clark. 



Trypanostoma Whitei. — Testa lsevi, attenuato-conica, crassiuscula, tenebro- 

 so-cornea ; spira valde elevata ; suturis regulariter impressis ; anfractibus 



