29 



ually tapering from the base ; volutions convex below, 

 appressed above, banded just below the suture, and marked 

 by transverse arching strire ; aperture ovate, wider below ; 

 umbilicus none. 



Length one inch. 



Locality. — Spergen Hill, la. 



BULMELLA, Nov. Genus. 



GENERIC DESCRIPTION. 



Shell fusiform or subfusiform (elongate); volutions of 

 moderate convexity, the last one much enlarged ; columella 

 truncate, outer lip thin with a slight notch or sinus at the 

 margin near its junction with the pillar. 



The three species here described have their nearest analo- 

 gies with Bulimus and Achatina so far as I can at present 

 determine. The shells can not be satisfactorily referred to 

 any established genus. 



t^BuLiMELLA bulimiformis. — Shell fusiform, elongate ; spire 

 nearly equal to half the length of the entire shell ; volutions 

 about six, slightly convex in the middle, increasing some- 

 what rapidly, the last one equaling in length all the others ; 

 aperture elongate-oval, acute at each extremity, slightly 

 sinuate at the upper outer angle ; columella slightly curved, 

 and truncate at the base ; surface smooth or with faint 

 lines of growth. 



Length *125 to '75 of an inch. 



Locality. — Spergen Hill ; Bloomington, la. 



Bulimella canalicul ata.— Shell subfusiform; somewhat 

 elongate ; spire short, scarcely equaling the length of the 

 last volution ; volutions about five, upper ones scarcely con- 

 vex, rapidly diminishing to the apex, last volution longer 

 than the spire above, slightly ventricose ; suture canalicu- 

 late, the groove margined by a slight sharp carination at 

 the upper edge of the volution ; aperture sub-ovate ; surface 

 smooth, or marked with fine lines of growth which are ab- 



