panamic-pacific pelecypoda 5+3 



Explanation of Plate 70 



Figure Page 



1-lc. Lyratellina lyra (Hanley) 384 



Fig. 1, enlargement of hinge FHgs. la, lb, left valves, length 

 respectively, 46.6 mm. and 47.8 mm. Bucaro, Panama. PRI 25870; 

 Fig. Ic, a right valve, length 56.2 mm. Fort Amador Beach, 

 Balboa, Panama Canal Zone. PRI 25871. 



2-2a. Merisca crystallina (Spengler) 382 



Right and left valves, fig. 2, length 25.4 mm.; Fig. 2a, length 

 19.6 mm. Monte Christi, Dominican Republic. PRI 25872. 



3-3b. Merisca rhynchoscuta, new species 382 



Fig. 3, length 22.8 mm., Guanico, Panama. Holotype, ANSP 218942; 

 Fig. 3a, length 24.2 mm., P'unta Montanita, Ecuador. Paratype, 

 ANSP 218943; Fig. 3b, length 23.3 mm., Cojimenes, Ecuador. 

 Paratype, ANSP 218944. 



4. Merisca sp 381 



Length 32.3 mm. Santa Elena, Ecuador. 



5-5a. Merisca margarita, new species 383 



Length 19.8 mm., San Miguel, Rey Islands, Pearl Islands, Panama. 

 Holotype, ANSP 218945. 



6-6a. Lyratellina lyrica (Pilsbry and Lowe) 384 



Length 45.8 mm. Off Punta Mala, Panama. Shrimpers. PRI 25873. 



