PLATE 11. 



Peronaea nigeriensis, sp. nov. 

 FIG. i. External view of a left valve. 



FIG. 2. Interior of another left valve showing the divergent cardinal teeth and the 

 nearly horizontal pallial sinus. 



FIG. 3. Interior of a right valve belonging to a different individual. 



Coralliophaga eocenica, sp. nov. 



FlG. 4. External aspect of left valve showing anterior umbo and acuminate posterior 

 end. x 2.\. 



FlG. 5. Interior of the right valve of same specimen with fractured ventral region. 

 X 2\. 



Teredo, sp. 



FlG. 6. Outer view of left valve showing the obliquely concentric ornamentation, x 2\. 

 FlG. 7. Interior of same valve with a well marked styloid myophore. x 2\. 



FIG. 8. Mass of Teredo tubes, one marked with a X containing remains of a pair of 

 valves of this genus. 



