panamic-pacific pelecypoda 485 



Explanation of Plate 12 



Figure Page 



1. Fernmytilns pnrpnratus (Lamarck) 117 



Inside view and enlargement of hinge, length 30.5 mm. Paracas, Peru. 

 PRI 25560. 



2. Hormomya exnstns (Linn6) 118 



Inside view and enlargement of hinge, length 31.5 mm. Florida. PRI 

 25561. 



3. Brachidontes citrinus (Roeding) 118 



Inside view and enlargement of hinge, length 32.1 mm. Florida. PRI 

 25562. 



4-4b. Mytilus arciformis (Dall) 113 



Figs. 4, 4a, various views and enlargement of hinge, length 55.3 mm. 

 Santa Elena, Ecuador. PRI 25563 ; Fig. 4b, length 48.5 mm. Posorja, 

 Ecuador. PRI 25564. 



5-5a. Scolimytilns (Aeidimytilus) adamsianns (Dunker) 121 



Inside view and enlargement of hinge, length 15 mm. Jipijapa (Puerto 

 Callo), Ecuador. PRI 25564. 



6. Mytilus ednlls Linne 113 



Enlargement of hinge. New Jersey. 



7-7a. Choromytilns palliopunctatus (Carpenter) 115 



Inside and outside views, length 28.4 mm. Acapulco, Mexico. 



8-8a. Mytella gnyanensis (Lamarck) 123 



Fig. 8, length 68 mm.; Fig. 8a, length 70.5 mm. Guayaquil, Ecuador. 



9-9h. Scolimytilns (Scolimytilns) aequatorialis, new species 120 



Length 10.1 mm. Punta Centinella, Santa Elena, Ecuador. Holotype, 

 ANSP 218927. 



10. Choromytilns chorus (Molina) 115 



Inside of right valve, length 114 mm. Chile. FRI 25569. 



