PLATE XCV— Continued. 



Edmondia RHOMBOIDEA. 

 Page 388. 

 See Plates 64, 75. 

 Fig. 15. A left valve showing the anterior muscular scar. 

 Fig. 16. A smaller and more convex j-ight valve. 



Chemung group. JVear Panama, JV. T. 



EdMONDIA ? TENUrSTRIATA. 

 Page 393. 

 See Plat* 63. 

 Fig. 17. A left valve showing the form and surface characters. 

 Chemung gi-oup. Elmira, N. Y. 



Pakacyclas elliptica 



Page 440. 

 See Plate 72. 

 Fig. 18. Cardinal view of a partial cast of the interior, showing the posterior diverging furrows. 

 Hamilton group. Falls of the Ohio river. 



Pakacyclas lirata. 



Page 441. 

 See Plate 72. 

 Fig. 19. Cardinal viewiof a specimen showing the small diverging ligamental grooves. 

 Hamilton group. Cbarlestovm, Indiana. 



Pakacyclas ? pauper. 



Page 446. 

 See Plate 75. 

 Pig. 20. The left side of a specimen retaining both valves. 

 Chemung group. Portville, J^. Y. 



Pakacyclas rotunda. 



Page 444. 



See Plate 63. 

 Fig. 31. A larg« right valve. 



Chemung group. Broome Co., N. Y. 



Pakacyclas erecta. 



Page 44S. 

 Fig. 22. The right side of a specimen showing the form of the shell. 

 Chemung group. Warren, Pa. 



