PLATE V. 



Figs. 1-16. 

 Figs. 2-2b. 

 Figs. 3-3f/. 

 Figs. 4-46. 

 Figs. 5-56. 

 Figs. 6-66. 

 Figs. 7-7c. 

 Figs. 8-8e. 



Figs. 9-96. 



Semele infans, n. sp., 

 Semele [Ahra) hraziliensis, n. sp., . 

 Semele (Abra) pkilippwensis, ii. sp., 

 Semele {Ahra) regularis, n. sp., 

 Semele {Ahra) i)rofinidorum, n. sp., 

 Semele {Theora) iridescens (Hinds), 

 Mactra incerto, u. sp., 

 Mactra pusilla A. Adams, . 

 Mactra jojcksonensis, n. sp., 



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