PHYSA. 129 
whorls six, last one inflated; suture decidedly 
impressed ; aperture broadly ovate, five-sixths 
the length of the shell; labrum thin, sub- 
margined with red; columella quite flexuous, 
covered with callus. 
Length 25, diam. 13 mill. 
Oregon ; Washington Territory. 
Distinguished by its large size, inflated form, 
and delicate structure; sometimes the form is 
somewhat cylindrical. Mr. Binney’s figure 
133 does not represent this species, but Ph. 
Traskii, Lea. Figure 6 represents a somewhat 
distorted specimen. 
4, PHYSA GABBII, Tryon. 
Plate 6, figs. 3, 4. 
Shell large, thin, closely striated by the 
lines of growth ; body whorl inflated, its upper 
half flattened, so that the labrum appears 
angulated in the middle ; spire moderate, apex 
acute, whorls six, convex, with distinct su- 
tures. Color light corneous, very much 
polished within ; lip margined with red. 
(45) 
