112 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
latter varies much in prominence in different specimens, and is often but 
barely perceptible. The hinge in the right valve is characterized by a single 
strong cardinal tooth with a slanting, somewhat sinuous groove above, 
and a slight notch and tooth-like point below the upper part of the lunule; 
this latter character is frequently inconspicuous and feeble. The valves 
are rather thin and somewhat translucent, bluish-white on the inside and 
showing the ribs when held up to the light. Length, IS; height, IS; 
diameter, 11 mm. (Stearns.) 
Type in U. S>. N. M., No. 104045. Type locality, Station 2840, off 
Santa Barbara, California. 
Range. Santa Barbara Channel to San Diego, California, in deep 
water. 
Venericardia gouldii Dali, 1902. 
Proc. Acad. Nat. Sci. Phila., p. 714. Proc. U. S. N. M., 26; pi. 63, fig. 3. 
Shell thin, ovate, inequilateral, moderately inflated with about 23 low, 
broad, rounded ribs with much narrower shallow interspaces, the anterior 
ribs slightly crenulated by fine transverse ridges, the ribs behind the 
umbos nearly smooth, covered by a yellowish-brown periostracum; 
lunule very small and impressed, escutcheon linear; inner margin crenu¬ 
lated below, hinge plate delicate, narrow, without marked laterals. Height, 
13.5; length, 16.5; diameter, 8 mm. (Dali.) 
Type in U. S. N. M., No. 109270. Type locality, off San Diego, 
California. 
Range. Known only from the type locality. 
Venericardia stearnsii Dali, 1902. 
Proc. Acad. Nat. Sci. Phila., p. 709. Proc. U. S. N. M., 13; pi. 16, figs. 5, 6. 
Shell short, plump, strong, with very high prosogyrate beaks and 
about 19 strong, rudely nodulous radial ribs with narrower interspaces 
and a dark-brown pilose periostracum. It has been figured as mentioned 
under V. ventricosa , having been erroneously taken as the type of that 
species by the writer. It is a much shorter and higher shell with a very 
small deeply impressed lunule and strong hinge, in which the lunular 
pustule in the left valve is conspicuous. (Dali.) 
Type in U. S. N. M. Type locality, Puget Sound. 
Range. Known only from the type locality. 
Venericardia paucicostata Krause, 1885. 
Plate 13, fig. 13. 
Arch. f. Naturg. y 51:1:30; pi. 3, fig. 3. 
Rippen 12—13, breit und flach, durch die Anwachslinien unregel- 
massig wellig quergestreift, ohne die regelmassige Furchen in der Nahe 
