222 2 28=6 A. E. Verrill on Shells from the Gulf of California. 
It belongs to the typical Venus, as restricted by Messrs. H. 
and A. Adams and most recent authors, but Romer has given 
the subgeneric name, Ventricola, to this group. 
Chione tumens, sp. nov. 
ment ; oe slightly truncate; ventrally broadly rounded ; 
anteriorly 
ttle recurved, marginal. 4 
or swellings are 12 or 14 in number, those near the beaks quite 
Length, 1:60 inches. 1:48 inches. 
Height, 166 gg 
readth, 20 + 1710 oy 
Apex to posteriorend, 145 * ca * 
La Paz,—Capt. J. Pedersen. Forty-tw im mostly 
oka ok. P nh. Sorty-two specimens, 
This species is very distinct from all others in its form and 
posal broad swollen ridges. It slightly resembles @. subim- 
cata, 
lamellar and the later ones much smaller, more numerous, and 
i beaked, the 
; mo. ; 4 * . 
much broader and stouter, with the inner edge much more sit 
