panamic-pacific pelecypoda 499 



Explanation op Plate 26 



Figure Page 



1-lc. Carditamera (Carditamera) radiata (Sowerby) 189 



Figs. 1, la, enlargement of hinge; Fig. lb, right valve, length 46 mm. 

 Panama City, Panama. PRI 25634; Fig. Ic, left valve, length 

 48.2 mm. Garachine, Panama. PRI 25635. 



2-2b. Cardlta (Cardita) cuvieri Broderip 186 



Figs. 2, 2a, enlargement of hinge; Fig. 2b, left valve, length 

 65 mm. Manglaralto, Ecuador. PRI 25636. 



3-3d. Carditamera (Byssomera) affinis (Sowerby) 189 



Figs. 3, 3a, enlargement of hinge. Manta, Ecuador. PRI 25637; Fig. 

 3b, right valve, length 49.1 mm. Mancora, Peru. PRI 25638; Fig. 3c, 

 right valve, the ventral side impressed, length 50 mm. Manta, 

 Ecuador. ITII 25639; Fig. 3d, right valve, ventral side smooth 

 and deeply impressed, length 37 mm. Burica Peninsula, Panama. 

 P'RI 25640. 



4-4c. Cardita (Cardita) tricolor Sowerby 185 



Figs. 4, 4a, length 43.3 mm., height 34.5 mm., diameter 30.4 mm.. 

 Figs. 4b, 4c, hinge of same specimen. Venado Beach, Panama 

 Canal Zone. PRI 25641. 



5-5a. Cardita (Strophocardia) megastropha Gray 187 



Interior and exterior of a right valve. Length 57.8 mm., height 

 58 mm. Manglaralto, Ecuador. PRI 25642. 



