212 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 23 



PLATE 18 



Cyclopecten (Delectopecten) vitreus (Gmelin), 1791. Off Martha's 

 Vineyard, Massachusetts, in 100-104 fathoms. A. E. Verrill leg., 

 18 — ? Height and length: 20.5 mm. (Grau collection.) P. 



