224 AMERICAN JOURNAL 



2. Physa Cooperi, Trjon. — t. 23, f. 9. 



Description. — Shell small ovate, rather solid, not inflated; 

 body whorl somewhat flattened above the middle, and nearly 

 the entire length of the shell ; spire very short, eroded, suture 

 not well impressed; surface roughly striate; columella nearly 

 straight, without fold ; lip bordered internally with red. 



Dimensions. — Length 8 millimetres, diameter 4| mill. 



Habitat. — Spring in "Crane Lake" Yalley, extreme N. E. 

 corner of California. W. M. Gabb. 



My Cabinet. Cabinet of Mr. Gabb. 



Observations. — I received a considerable number of this in- 

 teresting little species; it can scarcely be compared with any 

 other. It is peculiar for its small size, solid appearance and 

 heavy deposit within the labrum, I dedicate it to the distin- 

 guished zoologist attached to the California State Geological 

 Survey. 



8. Physa sparsestriata, Tryon. — t. 23, f 10. 



Description. — Shell ovately cylindrical, spire rather pro- 

 duced, apex acute, suture well impressed; surface malleated, 

 and covered with distant, sharp, raised growth-lines; texture 

 quite fragile; outer lip not thickened; columella narrow, and 

 turning somewhat to the right towards the base, very slightly, 

 or not at all folded. 



Dimensions. — Length 12 millimetres, diameter 7 mill. 



Habitat. — San Joaquin Valley, California. W. M. Gabb. 



My Cabinet. Cabinet of Mr. Gabb. 



Observations. — This species somewhat resembles in its strige 

 Ph. striata, Lea, but does not otherwise accord with that shell. 

 It is much more slender, more fragile, and has a longer spire 

 than Ph. heterostropha, Say. In form it is somewhat like Ph. 

 virginea, Gld.; but that is a smooth, polished species, of a 

 richer color, frequently almost golden in hue. It is a very 

 distinct shell of very constant character. 



4. Physa diaphana, Tryon. — t. 23, f. 11. 



Description. — Shell smooth, oval, lengthened; spire of mode- 

 rate length, suture impressed; body whorl four-fifths of the 

 entire length, somewhat cylindrical, very fragile; growth-lines 

 crowded, but minute; columellar lip very short, commencing 

 low down, very much appressed, and much twisted to the right 

 towards the base, polished, and very pearly. 



i 



