226 ANCYLUS. 
Length 3:5, width 2:2, alt. 1:5 mill. 
Northern Maine. 
This species resembles A. tardus in its gen- 
eral form. It is much smaller, however, and 
has a strong, heavy shell. 
B. SPECIES INHABITING THE PACIFIC STATES. 
11. ANCYLUS NEWBERRYI, Lea. 
Plate 2, fig. 9, 10. 
Shell large, obtusely pyramidal, dark, red- 
dish-brown, slightly compressed at the sides; 
apex subcentral, aperture elliptical. 
Length 13-8, width 10, alt. 5 mill. 
Klamath Lake, Pitt River, &c., California. 
This is the largest American species—a 
giant for the genus. 
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