138 PHYSA. 
* Oylindrical species. 
14. PHYSA VENUSTA, Lea. 
Plate 7, fig. 5. 
Shell subcylindrical, very thin, transparent, 
shining, white; spire short, pointed; sutures 
slightly impressed ; whorls four, slightly con- 
vex, the last one very large; aperture large, 
elongately ovate, within the margin brownish ; 
outer lip acute, sinuous and slightly expanded ; 
columella slightly impressed. 
Length 14, diam. 6°5 mill. 
Oregon. 
This species is a member of the group to 
which Ph. gyrina, Say, belongs; it is larger, 
however, paler in tint, and the lip is more 
arched. 
(54) 
