128 PHYSA. 



been detected in the waters of the Pacific 

 States and Territories. 



2. PHYSA TRASKII, Lea. 



Plate 7, fig. 4. 



Shell YQTj 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. 



3. PHYSA AMPULLACEA, Gould. 



Plate 6, figs. 5, 6. 



Shell large, ovate-ventricose, thin, fragile, 

 shining, horn-colored ; spire elevated, acute ; 



(44) 



