PLATE XXIII. 



PAGE. 



Fig. 1-4. CRENIPECTEN (Aviculopecten?) COOPERi, Depauperate form 



of, Herrick 509 



1-2. Allied species, as represented in the shales 50 feet below the conglomerate at 



Cuyahoga Falls. 

 3-4. Right and left valve of apparently the same species from the same place. 

 Fig. 5. Avicula RECTA Herrick. 



From same locality. 



Fig. 6 NUCULA HOUGHTONI (?). 



From same locality. 



Fig. 7-8. Cypricarditessp? 



7. From the highest horizon of the Waverly at Rushville. 



8. An interior view of the beak of a species of Syringothyris to show the form 



of the tube. 

 Fig. 9. Productus raricostaTus Herrick. 



From the Cuyahoga shale at Moots' Run, Licking County. A variable form in 

 some cases approaching P. lachrymosus. Found in shales and concretions. 



Fig. 10. Athyris ashlandensis Herrick. 



Cuyahoga shale of Ashl-nd and Licking counties. 

 Fig. 11. Spirifer disjunctus Hall. 



From the Erie shale, to compare with the Waverly species. 

 Fig. 12. Martinia prematura H. 



Erie shale as above. 



Fig. 13. Productus newberryi, var. annosus Herrick 



Lowest fossiliferous levels of Cuyahoga shale in Licking county. 



Fig. 14. Rhynchonella marshallEnsis Winchell. 



Very closely allied to R. sappho of the Chemung. The species occurs in the Cuy- 

 ahoga division and continues with slight variations into the upper series. 



Fig. 15. Productus rushvillensis Herrick. 



Characteristic of a horizon nearly 100 feet above conglomerate II at Rushville, 

 Newark and Loudouville. 

 Fig. 16. Rhynchospira (?) ashlandensis Herrick. 



Cuyahoga shale at Lyon Falls. (On the description of plates in vol. IV of the 

 Bulletins of Denison University where this species was first mentioned it was 

 called Heiorhynchus ? richlandensis.) 

 Fig. 17. TerEBRATula inconsTans Herrick. 



Lodi, Moots' Run, Richland Co , etc , Cuyahoga shale. 

 Fig. 18. Sanguinolites naiadiformis Winchell. 



Top of middle Waverly at Granville. The species is most abundant immediately 

 beneath conglomerate I. 



Fig. 19. Allorisma convexa Herrick. 



Middle Waverly in Licking county. 

 Fig. 20. Allorisma nobilis Dekoninck. 



Middle Waverly in Licking county. 

 Fig. 21. Goniodon (Pal^oneilo? OHIOENSIS Herrick. 



Cuyahoga shale, Moots' Run. 

 Fig. 22. Sphenotus contractus W. W. 



Cuyahoga shale at Moots' Run. ' 



