Fig. 



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Fig. 



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Fig. 



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Fig. 



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Fig. 



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Fig. 



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PLATE XXIV. 



PAGE. 



Leiopteria (Leptodesma) ortoni, Herrick 512 



Upper part of Cuyahoga shale, ("Waverly shale,") Licking county. 

 j. 2. Avicula SUBSPATULATA, Herrick. 



Division III, Burlington) Newark. 

 ;. 3. Crenipecten crenistriaTUS, Meek. 



.Same position and locality as the last. 



'. 4. Crenipecten caroli, Win. (?). 



Kinderhook (Div. II.) Gann. 



J. 5. Streblopteria Sp. 



Locality and position like the last. 



I. 6. Streblopteria Sp?. 



Division III (Burlington group) Newark. There is apparently a complete series of 

 transitions from Streblopteria media of the Cuyahoga shales to S. gracilis of the 

 Kinderhook and the present form. 

 Fig. 7. Grammysia ovaTa, Herrick. 



Upper part of Division II (Burlington group), Newark. 

 Fig. 8. Leiopteria halll Herrick. 



Kinderhook group 'Freestone of Division II), Granville. 



Fig. 9. Leiopteria Sp ? 



Location and position as above. 

 Fig. 10. Leiopteria (variety of) ortoni, Herrick. 



Freestone of Kinderhook group. 

 Fig. 11. LEPTODESMA scuTELLA, Herrick. 



Location and position as above. 



Pig. 12. Leiopteria ortoni, Herrick 



Three views of the cast. Cuyahoga shale. 



Fig. 13. Unidentified lamellibranch. 



Cuyahoga shale. 



Fig. 14. Streblopteria souama, Herrick. 



The generic position is doubtful. Cuyahoga shale Waverly shale), immediately below 

 conglomerate I. Granville. 

 Fig, 15. Streblopteria gracilis, Herrick. 



Kinderhook or Burlington division. 

 Figs. 16-17. Streblopteria media, Herrick 

 Figs. 16-17. Cuyahoga shales. Moot's run. 

 Fig. 18. POSIDONOMYA (STREBLOPTERIA) FRAGILIS, Herrick. 



Cuyahoga shales, Moot's run. 

 Fig. 19. LimaTULINA ? OHIOENSIS, Herrick. 



Division III v Burlington group), Licking county. 

 Fig. 20. 

 Fig. 21. Modiola yvaverliEnsis, Herrick. 



Division II. 



Fig. 22. aIyalina michiganensiS, Win. 



Division II Kinderhook). 

 Fig. 23. GONIODON (Pai.EONEILO) OHIOENSE, Herrick. 



Cuyahoga shale. 

 Fig. 24. Pterinopecten cariniferus, Herrick. 



Right valve. Cuyahoga shale. Moot's run. 

 Fig. 25. Unidentified. 



Cuyahoga shale 



Fig. 26. Entolium ayiculatum, Schum. 



Two specimens of the left valve. Cuyahoga shale. Moot's run. 



