panamic-pacific pelecypoda 515 



Explanation op Plate 42 



Figure P'age 



1-lc. Dosiniii (DosinidJa) ponderosa (Gray) 260 



Fig. 1, inside to show pallial sinus and adductor scars, length 73 mm. 

 Palo Seco, Panama Canal Zone. P'RI 25697; Fig. la, inside, note 

 the deep lunule, length 92 mm. Gulf of California. PRI 25698; Fig. 

 lb. otuside, length 99.4 mm. Pliocene, Jama, Ecuador. PRI 25699; 

 Fig. Ic, outside, note regular sculpture over the whole disk, length 

 81 mm. Manta, Ecuador. PRI 25700. 



2-2b. Dosinia (Dosinidia) annae Carpenter 262 



Fig. 2, inside, length 51.5 mm. Cojimenes, Ecuador. PRI 25701; Fig. 

 2a. outside of same specimen as fig. 2; Fig. 2b, outside, length 

 51.8 mm. Cojimenes, Ecuador. PRI 25701. 



3-3b. Dosinia (Dosinidia) dunkeri (Philippi) 261 



Inside to show large, pallial sinus, length 53 mm. San Miguel, Pearl 

 Islands, Panama. PRI 25703; fig. 3a. outside, length 49 mm. Santa 

 Elena, Ecuador. PRI 25702; Fig. 3b, outside, same specimen as 

 fig. 3. 



4-4a. Cyclinella saccata (Gould) 263 



Inside and outside, length 79 mm. Panama, shrimpers, Coll. H. B. 

 Johnson. PRI 25691. 



