panamic-pacific pelecypoda 493 



Explanation op Plate 20 



Figure Fage 



1-lb. LjTopecten (Ifodipecten) subnodosus (Sowerby) 161 



Fig. 1, left valve, height 91.2 mm.; Fig. la, interior of right valve 

 of same specimen; Fig. lb, right side view of same specimen. 

 Manta, Ecuador. PRI 25609. 



2-2b. Chlamys (Flexopecten) fascicnlata (Hinds) 167 



Fig. 2, right valve, height 31 mm.; Fig. 2a, left valve, height 31.7 mm.; 

 Fig. 2b, surface of left valve, magnif ed. Gorda Bank, Gulf of 

 California in 60 fathoms. California Academy of Sciences, No. 

 17715. 



3-3c. recten (Pecten) pemlus, new species 158 



Figs. 3, 3a, left valve, Manglaralto, Ecuador.; Fig. 3a, whitened to 

 show intercalated riblet. Paratype, ANSP 218919; Figs. 3b, 3c, 

 right valve, height 37.5 mm. Santa Elena, Ecuador. Holotype, 

 ANSP 218918. 



4-4b. Pecten (Pecten) vogdesi Arnold 158 



Copied from Arnold, 1906, Prof. Paper, U. S. Geol. Survey, No. 47, 

 pi. 46, f'gs. 1-lb (as P. excavatus Anton). Height of specimen 

 65 mm. Gulf of California. 



