Plate 31
PACIFIC COAST BIVALVES
a. GIANT PACIFIC COCKLE, Trachycar- dium qnndragejiarium Con., 5 inches (California), p. 398.
b. NUTTALL'S COCKLE, Clinucardium nuttalli Conrad, 4 inches (Alaska to California), p. 403.
c. CALIFORNIAN LUCINA, Codakia cali- jornica Conrad, Ij/^ inches (California), p. 390.
d. FRILLED VENUS, CJiione gnidia Brod. and Sby., 3 inches (Lower California to Peru), not in text.
e. PACIFIC COAST BITTERSWEET, G/y- cymcris subobsuletn Cpr., 1 inch (Alaska to Lower California), p. 349.
f. SMOOTH PACIFIC VENUS, Compso- myax .subdiaphana Cpr., 2 inches (Alaska to Lower California), p. 411.
g. NUTTALL'S LUC:iNA, Phacoides nuttalli Con., I inch (Santa Barbara, California, south), p. 388.
h. PISMO CLAM, Tivela stultorum Mawe, 5 inches (San Mateo, California south), p. 412.
i. FRILLED CALIFORNIAN VENUS, Chione calif, undatella Sby., 2 inches (California, south), p. 408.
j. COMMON CALIFORNIAN VENUS, Chione calijorniensis Brod., 2 inche; (San Pedro, California, south), p. 407.
k. SMOOTH PACIFIC VENUS, CJiione fliic- tifraga Sby., 23^^ inches (San Pedro, California, south), p. 408.
1. COMMON WASHINGTON CLAM, Saxi- domns nuttalli Con., 4 inches (Alaska to Lower California), p. 417.
m. and n. COMMON PACIFIC LITTLE- NECK, Protothaca staviinea Con., 2 inches (entire Pacific Coast), p. 410.
o. WHriE ROCK VENUS, P. staminea form ruderata Desh (most common in Alaska), p. 410.
p. CALIFORNIAN WEDGE SHELL, Douax californicus Con., 1 inch (Santa Barbara, California, south), p. 438.
q. COMMON PACIFIC WEDGE SHELL, Douax gouldi Dall, % inch ((California to Mexico), p. 435".
r. C;ALIF0RNIAN IRUS VENUS, Irus laviel- lifera Conrad, I inch (California), p. 142.
s. WAVY PACIFIC I'HRACilA, Cyathodouta uudulaia Con., I inch (California to Mexico), p. 472.
t. WEST COAST RUPELLARIA. Rupcl- laria telliniyalis Cpr., 1 inch (Califor- nia to Mexico), p. 420.
u. MODEST TELLIN, Tellina modesta Cpr.. % inch (Alaska to Lower California), p. 425.
v. CALIFORNIA CUMINGIA, Cumingia californica Conrad, I inch (California to Chili), p. 436.
w. STIMPSON'S SURF CLAM, Spi.mla poly- ?iyma form alaskcua Dall, 4 inches (Alaska), p. 446.
x. COMMON PACIFIC SPOON CLAM, Periplouia planijiscuhun SI)y., 1 inch (California to Peru), p. 473.
y. SALMON TELLIN, Tellina salmonea Cpr., 3/2 inch (Alaska to California), p. 426.
z. PACIFIC GAPER, Schizothaerus nuttalli Conrad, 7 inches (Washinoton to Lower California), p. 450.
