242 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 20 



PLATE 15 



Fig. 16. .hcopsis solida (Sowerby) 1833. Puerto San Carlos, Sonora, 



Gulf of California. Dorsal view to show ligament. Note the 



transverse striations. Length, 17.2 mm. 

 Fig. 17. Anadara tuberculosa (Sowerby) 1833. Bahia de Salinas, 



Costa Rica. a. Outside of right valve, b. Dorsal view. 



Length, 56 mm. 

 Fig. 18. A. {Scapharca) rcinharii (Lowe) 1935. Puerto Escondido, 



Gulf of California, a. Outside of right valve, b. Outside of 



of left valve, c. Dorsal view. 

 Fig. 19. Anadara cf. reinharti (Lowe) 1935. Bahia de Santa Lucia, 



Acapulco, Guerrero, Mexico, a. Outside of right valve. 



b. The same from inside. Length, 74 mm. 



