PLATE IX. 



PAGE. 



Figs. 1-3. Zaphrextis Cuffordana Ed. and Haime 465 



1. View ot an imperfect specimen showing the interior of the cup. 



2. Lateral view of another and smaller specimen. 



o. Enlarged transverse section of a specimen just below the bottom of the cup. 



Fig. 4. Pextremites eeegaxs Lyon 466 



4. Lateral view of a specimen from Xewtonville, Ohio 



Figs. 5-8. Cyathocrinus Maxvieeexsis Whitf. 465 



5. View of the anal side of a small specimen showing the long second radial plates 



and anal series, enlarged to two diameters. 

 and 7. Anterior and posterior sides of another individual showing the thickened 



outer arm of the antero-lateral ray and the small second radials of the anterior 



raj*, natural size. 



8. Anterior view of a third specimen, natural size showing the thickened lateral anus. 



Figs. 9-10. Synoceadia rectistyea Whitf. 467 



9. View of the inside of a frond, natural size, showing the straight rigid rays. 



10. Enlargement of a portion of the celluliferous surface showing the arrangements 

 of the cells. 



Figs. 11-12. Streptorhynchus crasstjm M. and W 468 



11 and 12. Impression of a ventral valve and a dorsal valve retaining the shell, the for- 

 mer showing the flattening of the umboual area. 



Figs. 13-14. Productus pieeiformis McChesney 470 



13 and 11. Front and profile views of a specimen referred to this species. 



Figs. 15-16. Productus elegans N. and P 469 



15 and 16. Two views of a specimen of this species of characteristic form. 



Figs. 17-18. Spirifera contracta M. and W 471 



17. Dorsal view of the type specimen from the Chester limestone of Illinois, introduced 



for comparison. 

 18 and 19. Dorsal and profile views of a specimen from the Maxville limestone, at New- 



tonville, Ohio. 



Fig. 20. Spirifera Rockymoxtaxa (?) Marcou 471 



20. View of a ventral valve showing rather stronger plications than most individuals. 



Figs. 21-22. Terebratuea turgida Hall 47s 



21 and 22. Dorsal and profile views of a specimen from Newtonville, Ohio. The figures 

 are slightly restored on the lower part. 



