panamic-pacific pelecypoda 533 



Explanation of Plate 60 



Figure Page 



1-la. Iphigrenia altior (Sowerby) 346 



Fig. 1, enlargement of hinge; Fig. la, left valve showing some 

 remnants of periostracum, length 58 mm. Puerto Chame, Chorrera, 

 Panama. PRI 25808. 



2-2e. Doiiax pemrianus Deshayes 343 



Fig. 2, dorsal aspect; Fig. 2a, enlargement of hinge; Fig. 2d, inside, 

 length 34 mm.; Figs. 2b, 2c, 2e, small specimen showing the 

 rayed color pattern, length 28 mm. Negritos, Peru. PRI 25809. 



3-3a. Donax naviculns Hanley 341 



Fig. 3, length 23.6 mm., San Carlos, Panama; Fig. 3a, length 24.1 

 mm. San Carlos, Panama. PRI 25810. 



4-4b. Donax carinatus Hanley 342 



Fig. 4, enlargement of hinge; Fig. 4a, length 37.3 mm. Tumbez, 

 Peru. PHI 25811; Fig. 4b, posterior view, length 35.5 mm. Cama- 

 rones, Ecuador. PRI 25812. 



5. Donax gracilis Hanley 341 



Length 22.6 mm. Bucaro, Panama. PRI 25813. 



