panamic-pacific pelecypoda 537 



Explanation of Plate 64 



Figure pfage 



1-lb. Semele cormgata (Sowerby) 361 



Fig. 1, enlargement of hinge; Figs, la, lb, length 68.3 mm. Bahia 

 de la Independencia, Peru. PRI 25827. 



2, Semele punctata (Sowerby) 365 



Length 49.7 mm. Galapagos Islands. Hanley Coll. British Museum 

 (Nat. History). 



3-3b. Semele tortuosa (C. B. Adams) 365 



Fig. 3, exterior of a right valve, length 45 mm.; Fig. 3b, sec- 

 tion of surface, magnified, Puerto Callo, Ecuador. PRI 25828; 

 Fig. 3a, length 1.25 inches. C. B. Adams Coll. Holotype. MCZ. 



4-4b. Semele flaYescens (Gould) 362 



Fig. 4, exterior of a left valve, length 53.6 mm.; Fig. 4a, section 

 of surface, highly magnified; Fig. 4b, dorsal view to show 

 escutcheon. Santa Elena, Ecuador. P'RI 25829. 



5. Semele elliptica (Sowerby) 362 



Exterior of a left valve, length 58 mm. Bahia Honda, El Lagartillo, 

 Panama. P'RI 25830. 



6. Semele laevis (Sowerby) 361 



Exterior of a left valve, length 91.5 mm. Mompiche, Ecuador. PRI 

 25831. 



7. Semele tabogensis Pilsbry and Lowe 366 



A left valve, length 64 mm. Venado Beach, Panama Canal Zone. 

 PRI 25832. 



8. Semele tabogensis rosea (Sowerby) 366 



A left valve, length 60 mm. Manta, Ecuador, PRI 25833. 



