32 . 



Strephobasis cornea. — Testa lsevi, cylindracea, crassa, cornea ; spira ol>- 

 tusa ; suturis irregulariter impresses ; anfractibus superne convexiusculis, ultimo 

 constricto ; apertura rhombo-quadrata, intus luteo-alba ; labro aouto, sinnoso ; 

 columella' sinuosa, ad basim incrassata et retro-canaliculata. 



Operculum small, ovate, spiral, dark brown, with the polar-point near the 

 base. 



Hab. — Tennessee River. Wm. Spillman, M. D. 



Strephobasis Clarkii.- — Testa, lasvi, cylindracea, subtenui, luteo-cornea, 

 trivittata, ; spira valde obtusa, curti ; suturis irregulariter impressis ; anfracti- 

 bus quinis, superne convexiusculis, ultimo constricto ; apertura subgrandi, 

 quadrata, intus albida, valde vittata ; labro acuto ; columella sinuosa, ad basim 

 alba, incrassata et retro-canaliculata. 



Hali. — Tennessee River, at Chattanooga, Tennessee. Joseph Olark. 



