180 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 23 



PLATE 2 



Fig. 1. Propeamussium malpelonium (Dall), 1908. Paratype. Alba- 

 tross station 3374, off Malpelo Island, west Colombia, in 

 1823 fathoms. Height: 19.5 mm; length; 20 mm. (Grau 

 collection. Photograph by R. V. George.) P. 



Fig. 2. Cyclopecteri (Hyalopecten) Jieoceanicus (Dall), 1908. 

 Holotype. Albatross station 4721, SW of Galapagos Islands, 

 in 2084 fathoms. Height and length: 12 mm. (U.S. National 

 Museum collection, no. 110579. Photograph by F, B. Kest- 

 ner, U.S.N.M.) P. 



