PLATE LIX. 



Gkammvsia pk>ecuusou, 



Page 376. 

 Fig. 1. The right side of a ppecimen preserving both valve.s. 

 Schohaiie grit. Schnlmrle, N. Y. 



Grammysia skcunda. 



Page 376. 

 Figs. 2, 3. Cardinal view and right side of a specimen. 



Comiferous limestone. Clarence ffollme, N. ¥. 



-■ -yiirtAife' 



GkAMMY8IA constricta ? 

 Page 3T7. 

 See Plate 78. 

 Figs. 4, 5. Right and left sides of the same specimen, refei-red to this sjiecit* with iloiibt. 



Fi-om a compact limestone in the Mai-cellus shale. iVieor Buffalo, iV. Y. 



Grammysia lirata. 



Page 371. 

 Fig. 6. Left side of a small specimen. 



Hamilton group. Schoharie Co., N. Y. 

 Fig. 7. A cardinal view of a .specimen holding the two valves in conjunction. 

 Fig. 8. A larger indiWdual. 



Hamilton grouj). Schoharie Co., N. Y. 

 Fig. 9. The left side of an individual retaining the two valves in conjimction. 

 Fig. 10. Cardinal view of a larger 8i)ecimen. 



Hamilton group. Schoharie Co., N. Y. 

 Fig. 11. A right valve of another individual. 



Hamilton group. Schoharie Co., N. Y. 

 Fig. 12. A cardinal view of a specimen. 



Hamilton group. Schoharie On., N. Y. 



