A. FE. Verrill on Shells from the Gulf of California. 225. 
color, there are specimens which are, to a considerable extent, 
, intermediate. It is also nearly impossible to satisfactorily sepa- 
tate young specimens, half an inch in diameter or smaller, 
. Papyridea bullata Sw. var. Californica, nov. 
| In form and color like the ordinary West Indian specimens, 
but perhaps a little more elongated than the average Atlantic 
form. Sculpture also similar in all respects, except that the 
% __—‘tadiating ribs are more prominent in the middle and especial 
: over the umboes. The hinge shows some differences. In bot 
valves the anterior lateral tooth is less prominent, narrower, 
and smaller, and the ligament plate is more prolonged and not 
€ same color, like some of the West Indian. The largest 
specimen is 1°75 inches long and 1°38 high. 
Paz,—J. Pedersen. ‘Ten specimens. 
Cardita Cuviert. 
Broderip, Zodl. Soe., Proc. of Comm. of Science, p. 55, 1832. 
: Cardita Michelini Val., Voy. Vénus, Pl. 22, fig: 5, 1846. 
_ Actinobolus Cuvieri Adams, Genera Rec. Moll., ii, p. 487, 1858. 
between. e color is deep mahogany brown, varying in 
shade ; within white. ‘“. 
Length, 2°50 inches. 2°10 2°15 
Height, P4550 2°20 2°15 
Breadth, 2°25 . 1:80 165 
La Paz,—J. Pedersen. From pearl divers. 
Tounded, with the interspaces, road, shallow, concave, 
‘ally wrinkled. Color deep reddish brown ; sometimes 
- JOUR, Sct.—SEconp SERIES, Es, VOL. XLIX, No. 146.—Mancz, 1870. 
' if = 15 Ae, se ie - 
