PLATE XXIV. 



PAGE. 



Fig. I. ■ Leiopteria (Leptodesma) ortoni, Herrick 512 



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



Fig. 2. Avicula subspaTulata, Herrick. 



Division III, (Burlington) Newark. 



Fig. 3. Crenipecten crenistriatus, Meek. 



Same position and locality as the last. 



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



Kinderhook (Div. II.) Gann. 



Fig. 5. Streblopteria Sp. 



Locality and position like the last. 



Fig. 6. Streblopteria Sp?. 



Division Itl (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. I/EiCiPTERiA halm, Herrick. 



Kinderhook group (Freestone of Division II), Granville. ^ 



Fig. 9. LEIOPTERIA Sp ? 



Location and position as above. 

 Fig. 10. LeiopTKRIa (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 squama, 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 (Burlington group), Licking county. 

 Fig. 20. 



Fig. 21. Modiola waverliEnsis, Herrick. 



Division II. 

 Fig. 22. MYALINA MICHIGANENSiS, Win. 



Division II (Kinderhook). 

 Fig. 23. Goniodon (Paleoneilo) ohioense, Herrick. 



Cuyahoga shale. 



Fig. 24. Pterinopecten cariniferus, Herrick. 



Right vaive. Cuyahoga shale. Moot's run. 

 Fig. 25. Unidentified. 



Cuyahoga shale 

 Fig. 26. Entolium aviculaTum, Schum. 



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



