26 PEOCEEDINGS OF THE NATIONAL MUSEUM vol. 06 



SANGUINOLARIA (NUTTALLIA) ORCUTTI Dall 



Plate 12, figs. 1, 2 



Sanguinolaria (Nuttallia) orcutti Dall, West Amer. Scientist, vol. 19, No. 2, 

 p. 17, 1921. 

 Pliocene (?) of San Quentin Bay, Lower California. U. S, Nat. Mus. Cat. No. 

 ;;33118. 



SEMELE QUENTINENSIS Dall 



Plate 8, fig. 4 



Semele qtientinensis Dall, West Amer. Scientist, vol. 19, No. 3, p. 22, 1921. 



Pliocene (?) of San Quentin Bay, Lower California. U. S. Nat. Mus. Cat. No. 

 333114. 



SEMELE RUBROPICTA Dall 



Plate 18, figs. 1, 2 



Semele r-uhropicta Dall, Amer. Journ. Conch., vol. 7, p. 144, pi. 14, fig. 10, 

 1871. 

 Beach at Soquel, Monterey Bay, Calif. U. S. Nat. Mus. Cat. No. 101960. 



SERRIPES LAPEROUSII Deshayes 



Plate 20, fig. 3 



Cardium laperousii Deshayes, Rev. Zool. Soc. Cuv., 1839, p. 360; Mag. de 

 ZooL, 1841, pi. 48. 

 Unalaska, Alaska. U. S. Nat. Mus. Cat. No. 221603. 



SILIQUA PATULA Dixon 



Plate 19, fig. 3 



Solen patulus Dixon, Voyage, p. 355, fig. 2, 1788. 



Bering Island, Bering Sea. U. S. Nat. Mus. Cat. No. 106876. 



SIPHONARIA (LIRIOLA) THERSITES Carpenter 



Plate 33, figs. 2, 3 



Siphonaria thersites Carpenter, Ann. Mag. Nat. Hist., ser. 3, vol. 14, p. 425, 

 1864. 

 Southeastern Alaska. U. S. Nat. Mus. Cat. No. 55802. 



SOLARIELLA ELEGANTULA Dall 



Plate 23, figs. 5, 9 



A single specimen was dredged by the U. S. Bureau of Fisheries 

 steamer Albatross in the Gulf of California, off La Paz, in 261/2 

 fathoms. The height of the specimen is 5.5 mm. U. S. Nat. Mus. 

 Cat. No. 111384. 



SPISULA CAMERONIS Dall 



Plate 10, fig. 2, plate 11, fig. 4 



Spisula cameronis Dall, West Amer. Scientist, vol. 19, No. 3, p. 22, 1921. 



Pliocene (?) of San Quentin Bay, Lower California. U. S. Nat. Mus. Cat. No. 

 333117. 



