panamic-pacific pelecypoda 553 



Explanation op Plate 80 



Figure Page 



1-lc. Jouaunetia (Jonannetia) dnchassaingl Fischer 450 



Fig. 1, after Fischer, 1862; fig. la, length 43.3 mm., figs, lb, Ic, 

 height 28 mm. Manta, Ecuador. P'RI 25931. 



2-2a. Hastasia quadra (Sowerby) 449 



Fig. 2, length 22.8 mm. Crucitas, Ecuador. PRI 25932. 



3-3a. Jouannetia (Pholadopsis) pectinata Conrad 451 



Fig. 3, height 24.3 mm., Santa Elena, Ecuador. Fig. 3a, after Ruth 

 Turner, 1955. 



4. Xylophaga mexicana Dall 451 



After Ruth Turner, 1955. Acapulco, Mexico. 



5-5a. Parapholas calya (Sowerby) 447 



6-6a. Figs. 5, 5a, length 32 mm., fig. 6. another specimen with the im- 

 pression of second borer. Fig. 6a, view looking into the posterior 

 end showing the valved partitions within. Jaramijo, Ecuador. PRI 

 25933. 



7-7b. Oastrochaena (Rocellaria) ovata Sowerby 441 



Length 19.2 mm. Manta, Ecuador. PHl 25934. 



8-8a. Gastrochaena (Gastrochaena) ecnadoriana, new species 440 



Length 19.3 mm. Punta Montanita, Ecuador. Holotype, ANSP 218914. 



9-9a. Ensitellops pacifica, new species 241 



Fig. 9, length 5.4 mm. Holotype, ANSP 218893; Fig. 9a, length 

 3.2 mm. Paratype, ANSP 218894. El Lagartillo, Ecuador. 



