682 NEW YORK STATE MUSEUM 



PLATE 7 



Orbiculoidea ? magnifica Clarke 

 p. 615 



(See pi. 8) 



FIG. 



1 The half of an infolded pedicle valve showing the pedicle open- 

 ing extending for the full radius of the shell. The margin 

 of the infolded portion of the valve is visible at the peri- 

 phery of the shield. 

 Portage beds. Tannery gully, Naples N. Y.; at an horizon 

 just above the final appearance of the Naples fauna. 



