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 llexuous, 

 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. 

 TrasJdi, Lea. Figure 6 represents a somewhat 

 distorted specimen. 



4. PHYSA GABBII, Tri/on. 



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) 



