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ALLAN HANCOCK PACIFIC EXPEDITIONS 



VOL. 20 



Fig. 87. Anadara {Scapharca) biangulata (Sowerby) 1833. Isla 



Isabel, Gulf of California, a. Lateral view. b. Dorsal view. 



c. Abdominal sense organs. Length, 25.6 mm. 

 Fig. 88. A. {Scapharca) aviculaeformis (Nyst) 1848. Isla Isabel, 



Gulf of California, a. Lateral view. b. Dorsal view. c. 



Abdominal sense organs. Length, 54.5 mm. 

 Fig. 89. A. {Scapharca) emarginata (Sowerby) 1833. Canal de 



Marcy, Bahia de la Magdalena, Baja California, a. Lateral 



view. b. Dorsal view. c. Abdominal sense organs. Length, 



14.8 mm. 



