186 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 23 



PLATE 5 



Cyclopecten benthalis sp. nov. Holot3'pe. Hancock expeditions station 

 3031-55, 14.5 miles NNW of San Nicolas Island, California, in 490 

 fathoms. Height: 8 mm; length: 7.5 mm. (Hancock Foundation col- 

 lection.) P. 



