232 ACROLOXUS. 
2. ACROLOXUS FILOSUS, Conrad. 
Hald. Monog. p. 10, t. 1, fig. 9. 
B. Species of the Pacific States. 
3. ACROLOXUS NUTTALLII, Haid. 
Shell fuscous, oval, elevated, apex one- 
fourth of the entire length from one end. : 
Length 8, width 6°25, alt. 3 mill. 
Oregon. 
This species was described by Prof. Halde- 
man on the cover of Part 3 of his Monograph, 
but not figured. I can give no information 
concerning the species, which I have not seen. 
(26) 
