248 ALLAN HANCOCK. PACIFIC EXPEDITIONS VOL. 20 



PLATE 16 



Fig. 28. Anadara {Scapharca) obesa (Sowerby) 1833. Off San Jose, 



Ciuatemala. a. Dorsal view. h. Outside of left valve. 



Length, 26.3 mm. 

 Fig. 29. A. (Cunearca) nux (Sowerby) 1833. Off San Jose, 



Guatemala, a. Outside of right valve, b. Outside of left 



valve, c. Dorsal view. Length, 20.2 mm. 



