618 Contributions to Invertebrate Palasontology. 



PoLYPHEMOPSis MELANOiDES Wliitf. Page 592. 

 Fig. 13. View of a specimen showing the form and proportions. 



Macrocheilus sdbcokpulentps Whitf. Page 591. 

 Fig. 14. View of the aperture. 



Naticopsis ziczAC Whitf. Page 590. 

 Figs. 15 and 16. View of the back of the shell, natural size and enlarged, 

 showing the peculiar surface markings. 



Bellerophox alternodosus Whitf. Page 593. 

 Figs. 17-19. Three views of the same specimen, which is slightly imperfect. 



Bellerophon suBLiEvis Hall. Page 592. 

 Figs. 20 and 21. Back and profile views of a specimen from which the shell 

 is mostly removed. The auriculations being only partially pre- 

 served and the front removed. 



Nautilus (Temnocheilus) spectabilis M. and W. Page 594. 

 Fig. 22. Lateral view of the inner septate portion of a specimen from near 

 Rushville, Ohio, showing the character of the shell. 



Nautilus pauper Whitf. Page 595. 

 Fig. 23. View of the specimen described showing the outer chamber and 

 impression of the inner coils. 



PLATE XY. 



DisciNA Meekana Whitf. Page 598. 

 Figs. 1 and 2. Vertical and profile views of an upper valve from Carbon Hill, 



Ohio. 

 Fig. 3. Vertical view of another imperfect specimen. 



Cyathocrinus Someesi Whitf. Page 596. 



Fig. 4. Basal view of the specimen, natural size. 



Fig. 5. Enlarged radial plate showing the character of the nodes. 



Zeacrinus Mooresi Whitf. Page 597. 



Fig. 6. Basal view of a calyx. 



Fig. 7. Anal view of the same. 



Figs. 8 and 9. Lower and lateral views of a second radial plate showing the 



character of the spine. The specimen bears a valve of Crania 



carbonaria. 

 Fig. 10. Lateral view of a more slender spined plate. 



