ANCrLUS. 



145 



Black Rrver, neaf Puget Sound. 

 The shell figured is from Judge Cooper's collection, 

 scription of it was ever published. 



Xo de- 



Fig. 244. 



Ancylus liewl»erryi, Lea. — Shell large, obtusely pyramidal, 

 opaque, smoky red, sides somewhat com- 

 pressed ; apex sub-central ; aperture ellip- 

 tical. 



Klamath Lake, California : Dr. J. S. New- 

 berry. {Lea.) 



Ancylus neivherryi, Lea, Proc. Acad. Nat. 

 Sc. Phila. 1858, 166. 



Ancylus neidberryi. 



The figures I have given above are 

 from authentic specimens of A. newberryi. They are the size of 

 the shell, which is extremely large for the genus. 



It was from this species that the Fig. 231, on page 139 was 

 drawn. 



The lingual membrane is composed of 72 rows — 55 denticles in 

 a row ; central tooth minute, laterals bidentate ; uncini irregu- 

 larly denticulated. 



Fig. 245. 



Ancylus crassilS, Haldeman. — Shell coarse, somewhat ponderous, 

 wide, ovate, elevated, lines of growth conspicuous ; apex 

 eroded, placed far back ; anterior and lateral slopes convex, 

 posterior slope steep and rectilinear. Color opaque chestnut- 

 brown. Dimensions : Long. 8, lat. 6.25, elev. 3 mill. 



Brought from Oregon by Mr. Nuttall. 



Distinguished by its opacity and thick texture — all the pre- 

 ceding species being more or less translucent and delicate. 

 (^Haldeman.') 



Ancylus crassus, Haldeman, Mon. p. 14, pi. i, f. 8 (1844). 



Fig. 245 is copied from Haldeman's, whose description is also 

 given above. 



