EXPLANATION OF PLATES 



Plate III. 



Page 



Figs. 1, 2. Eupachycrinus mooresi (Whitfield) 42 



McArthur limestone? Carbon Hill, Hocking County. 

 Fig 1. Basal view of calyx showing attachment of 



second radial plates. 

 Fig. 2. Front view of single second radial plate 



showing character of spine. 



Figs. 3, 4, 5. Lingula carbonaria Shumard 44 



Fig. 3. Anthony coal horizon: mine of William E. 



Dee, Scioto County. x2. 



Figs. 4, 5. Upper Mercer limestone. Vinton County. 

 x2 



Figs. 6, 7, 8. Orbiculoidea stoutella n.sp 46 



Harrison ore: Jackson County. 



Fig. 6. Internal cast of dorsal valve of a cotype 



showing internal markings. x2 

 Fig. 7. Internal cast of another cotype. 

 Fig. 8. Side view of a third cotype. 



Figs. 9, 10. Chonetes mesolobus Norwood and Pratten 51 



Lower Mercer limestone: southeast of Frazeysburg, 



Muskingum County. 

 Fig. 9. Ventral valve. 

 Fig. 10. Dorsal valve. 



Figs. 11, 12. Chonetes choteauensis Mather 50 



Lowellville limestone: Poverty Run, Muskingum 



County. 



Fig. 11. Ventral valve. x2 

 Fig. 12. Same x2 



Figs. 13, 14, 15, 16. Spirifer boonensis Swallow? 56 



Boggs limestone: near Hopewell P.O., Muskingum 



County. 



Figs. 13, 14. Ventral valves. 

 Figs. 15, 16. Dorsal valves. 



Figs. 17, 18, 19, 20, 21, 22. Spirifer opimus Hall 57 



McArthur limestone?: Carbon Hill, Hocking County. 

 Figs. 17, 18, 19. Ventral valves. 

 Figs. 20, 21, 22. Dorsal valves. 



89 



