panamic-pacific pelecypoda 497 



Explanation of Plate 24 



Figure Page 



1-la. Placnanomia cumingii Broderip 178 



Exterior and interior of a right valve, length 69 mm. Fig. 1, shows 

 external sculpture, attachment area, and calcified byssal plug; Fig. 

 la, interior of the same valve, showing crural elements, byssal 

 retractor and adductor muscle scars. Jaramijo, Ecuador. PRI 25621. 



2-2f. Anomia penniana d'Orbigny 177 



Fig. 2, height 53.3 mm. Santa Elena, Ecuador. PRI 25622; Fig. 2a, 

 height 42.6 mm.; Figs. 2b, 2c, height 46.4 mm.; Fig. 2d, height 

 43.3 mm.; Fig. 2e, externally ribbed, height 41.4 mm.; Fig. 2f, 

 externally ribbed, height 30.3 mm. Bayovar, Peru. PRI 25623. 



3-3d. Pododesmus foliatiis (Broderip) 17S 



Figs. 3, 3a, height 44.6 mm. Lobitos, Peru. PRI 25624; Fig. 3b, 

 height 40.7 mm. Funta Blanca, Ecuador. PRI 25625; Figs. 3c, 3d, 

 height 31.2 mm., part of surface enlarged. Isla la Plata, Ecuador. 

 P'RI 25626. 



4-4a. Anomia fidenas Gray 177 



Figures of the holotype of Anomia tenuis Adams. MCZ 186137. 



