214 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 23 



PLATE 19 



Cyclopecien (Delectopecten) zacae (Hertlein), 1935. Hancock ex- 

 peditions station 761-38, off Inner Gorda Bank, Gulf of California, 

 in 345 fathonns. Height: 17 mm; length: 16 mm. (Hancock Founda- 

 tion collection.) P. 



