panamic-pacific pei.ecypoda 495 



Explanation of Plate 22 



Figure Page 



1. LjTopecten (Nodipecten) ma^ificns (Sowerby) 161 



Copied after Reeve, pi. 2, fig. 9. Galapagos. 



2-2a. Spondylus calcifer Carpenter 153 



Fig. 2, length 95 mm., Isla la Plata, Ecuador, ANSP 55994 (in 

 Academy collection as pictorum) ; F^g. 2a, length across upper 

 valve 100 mm. Pearl Islands, Panama. 



3-3a. Aeqoipecten (Leptopecten) biolleyi (Hertlein and Strong) 166 



Fig. 3, natural size; Fig. 3a, whitened, length 6.9 mm. Esmeraldas, 

 Ecuador. PRI 25612. 



4. Spondylus princeps princeps Broderip 152 



Copied after Reeve, pi. 2, fig. 9. Isla la Plata, Ecuador. 



5. Spondylus princeps leucacanthns Broderip 152 



Length 55.1 mm. Swift collection, ANSP 55983. 



6. Spondylus princeps unlcolor Sowerby 152 



Length 89 mm.. Gulf of California. ANSP 55992. 



7. Ostrea ( — ) iridescens Gray 174 



Small shells, showing the broad marginal band formed by the 

 upper layer and details of its surface. Punta Patilla, Panama City, 

 Panama. PRI 25613. 



8. Spondylus princeps princeps Broderip 152 



Length 90 mm., Isla la Plata, Ecuador. ANSP 55994. (In Academy 

 collection as pictorum.) 



