PLATE XVI. 



PAGE 



Fig. 1. Sphexotus yalylxus, Hall 514 



Upper part of Cuy ihoga shale 30 feet below conglomerate I. 



Fig. 2. Prothyris xieeki, Hall. 



Kinderhook, Shales below conglomerate II 



Fig. 3. Ctexodoxta houghtoxi, Stevens. 



Cuyahoga shale. 

 Fig. 4. Pal^Eoxeilo curta, Herrick. 



Kinderhook Freestone, Granville. 

 Fig. 5. Dexiobia oyaTa, Hall. 



Kinderhook, near conglomerate II, Newark. 

 Fig. 6. Oracardia corxuta, Herrick. 



Cuyahoga shale, "Waverly shale" below conglomerate I. 



Fig. 7. Dexiobia ovata, Hall. 



Kirderhook, Garni 

 Figs. 8-10. Oracardia corxuta, Herrick. 



Kinderhook Freestone, Granville. 

 Fig. 11. Nuculaxa sp. 



Kinderhook. near conglomerate II, Gann. 



Fig. 12. Ncculaxa sp. 



Kindtrhook, Granville. 

 Fig. 13. Nuculaxa sixiilis, Herrick. 



Below conglomerate I. 

 Fig. 14. Pai^Eoxeilo coxsixiilis, Herrick. 



Ba'-e ot Cuyahoga shale, Harlem. Delaware count y 

 Fig. 15. Pal^Eoxeilo igxota, Herrick. 



Cuyahoga shale, Moot's run. 

 Fig. 16. Nuculaxa saccata, Winchell. 



"Waverly shale," below conglomerate I. 

 Fig. 17. Pal^EONeiuo sulcaTixa, Conrad. 



Cuyahoga shale. 

 P'ig. 18. Pal.Eoxeilo (?) xiarshallexsis, Winchell. 



This specimen is Irora the upper parts of the Wav rly but is found throughout 

 the series with no obvious differences. It seems to be identical with Hall's 

 Palseoneilo truncata and Winchell's Sanguinolites marshallensis. 

 Fig. 19. Macrodox xewarkexsis, Herrick. 



Burlington and Keokuk, Xewark, O. 

 Fig. 20. Spathelt-A yextricosa, Hall. 



Keokuk. Freestone at Granville O. 

 Fig. 21. aIvtilarca fibristriata, W. and W. 



Cuyahoga shale. Xloot's run. 



Fig. 22. Nuculaxa diyersaH (?). 



Peninsula O. 



Fig. 23. Nuculaxa xucui.-^Eforxiis, Stevens (?). 



Burlington. Xewark, O 



