PLATE LXIX—Continued. 
Panenica POTENS. 
Page 422. 
Fig. 8. Right side of a specimen showing- the form and sui’face characters. 
Hamilton group. Madison Co., N. Y. 
Fig. 10. The left side of a specimen retaining both valves in conjunction. The right valve is erroneously 
represented as having a broad ligamental area. 
Hamilton group. 
Madison Co., N. Y. 
Panenica radians. 
Pag-e 422. 
Fig. 9. Left side of a. specimen retaining both valves. 
Hamilton group. 
Cazenovia, N. Y. 
Panenica abrupta. 
Page 423. 
See Plate 94. 
Fig. 11. Cardinal view of a cast of the interior. 
Hamilton group. 
Cumberland, Md. 
Panenica Tanckl.eni. 
Page 420. 
Fig-. 12. A right valve of ordinary size. 
Marcellus shale. Ontario Co., N- Y. 
Fig. 13. A somewhat larger right valve of this species. 
Marcellus shale. Mission House, four miles south of Buffalo, N. Y. 
Fig. 14. An unusually large left valve. 
Marcellus shale. Mission House, four miles south of Buffalo, N. Y. 
