Var NSoricus. 
Vo. XII. SEPTEMBER, 1898. No. 5. 
BIFIDARIA ASHMUNI, A NEW SPECIES OF PUPIDE. 
BY DR. V.“SPERKI. 
Shell cylindro-conical, with the apex rather acute, base perforated- 
rimate ; whorls five, convex, with a rather deep suture, regularly 
increasing, the last somewhat protracted, with a crest remote from 
the aperture and forming a projecting angle at the base, at last 
ascending; aperture strongly lateral, rounded subtriangular, equal- 
ling one-third the altitude of the shell, highest near its columellar 
side, with a sinus above on the palatal side; margin continuous, 
strongly everted, broadest so below, without a lip thickening; 
parietal lamella very large, strongly curved, nearer the periphery 
at its inner end; angular lamella large, at its inner end united with 
the side of the parietal, at the outer with the palatal margin, thus 
closing the sinus above; columellar lamella large, spiral, ascending 
to the body whorl between the parietal and columella; basal lamella 
and inferior palatal fold deep in the throat, the former radial, the 
latter above it, oblique; superior palatal short, tooth-like, rather 
remote from the margin; surface shining, with slight, irregular 
‘strize and microscopically rugulose, as is also the nucleus; shell 
horn colored, transparent ; lamelle and folds whitish; alt. 2:0, diam. 
1-1 mill. 
Habitat: Arizona and New Mexico. 
The soft parts could not be examined. In one living specimen, 
‘the foot and head were almost colorless, the mantle was slate- 
-colored. 
