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. 

 ]). 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. 



