Samele rupium Sby. Semele-of-the-Rocks. [Fig. 28.]
Cumingia californica Conr. California Cuming-shell. [Fig. 29.]
Mya (Cryptomya) californica Conr. False Mya. [Fig. 30.]
Spisula planulata Conr. [Fig. 31.]
Spisula falcata Sld. (?). Falcate Mactra. [Fig. 32.]
Paphia staminea Conrad. Ribbed Carpet-shell. [Fig. 33.]
Paphia tenessima Cpr. Finest Carpet-shell. [Fig. 34.]
Parapholas californica Conr. California Piddock. [Fig. 35.]
Pholadidea penita Conr. Common Piddock. [Fig. 36.]
Pholadidea subrostrata Sby. Little Borer. [Fig. 37.]