128 PHYSA. 
been detected in the waters of the Pacific 
States and Territories. 
2. PHYSA TRASKII, Lea. 
Plate 7, fig. 4. 
Shell very much inflated, somewhat oblique, 
striate, semi-transparent, very thin, pale 
chestnut color; spire somewhat produced, 
pointed at the apex; sutures impressed ; 
whorls six, the last one very large and very 
much inflated; aperture broadly expanded ; 
outer lip acute, and within the margin brown- 
banded; columella impressed in the middle 
and furnished with a large fold. 
Length 19, diam. 12 mill. 
Rio Los Angelos, California. 
38. PHYSA AMPULLACEA, Gould. 
Plate 6, figs. 5, 6. 
Shell large, ovate-ventricose, thin, fragile, 
shining, horn-colored ; spire elevated, acute ; 
(44) 
