OF DENISON UNIVERSITY. 
65 
PLATE I. ' 
(Figures, unless otherwise indicated, natural size.) 
Fig. I. Entolium aviculatum. Swallow^ left valve. 
Pdg. 2. Right valve of the same — p. 23. 
Fig. 3. Aviculopecten ? 
Fig. 4. Aviculopecten coxanus, M. and W. 
Fig. 5. Aviculopecten hertzeri, Meek^ or related species — p. 25. 
Fig. 6. Aviculopecten sp? — p. 27. 
Fig. 8. Aviculopecten scalaris, — p. 26. 
Fig. 9. 
Fig. 10. Aviculopecten hertzeri. Meek — p. 25. 
Lig. II. Entolium attenuatum, He^'rick — p. 24. 
Fig. 13 . Martinia ])lanoconvexa, Sch — p. 46. 
Fig. 13. a, b, c. Martinia lineata, Martin — p. 46. 
Fig. 14. Stricklandia ? subquadrata, Herrick — p. 49. 
Fig. 16. a, b, c. Athyris subtilita ?? — cf. Pal. Neb. Plate I, 
Fig. 12. 
Fig. 17. Aviculopecten coxanus, M. and W. — p. 26. 
Fig. 18. Athyris subtilita, Hall — p. 44. 
Fig. 19. Solen sp. — p. 38. 
Fig. 20. Aviculopinna americana. Meek — p. 38. 
Fig. 21. Ostracode crustacean ? a single valve. 
Fig. 22. Allorisma sp? 
Fig. 23. Phillipsia trinucleata, Herrick. 
Fig. 24. Productus sp. Small individual. 
PLATE II. 
Fig. I. Bellerophon montfortianus, N. and P. — p. 19. 
Fig. 2. Macrocheilus planus? — p. 3i. 
Fig. 3- 
Fig. 4 and 5. Euomphalus sp. — p. 22. 
Fig. 6. Spirifer sp. 
Fig. 7. Bellerophon SLibcordiformis, Herrick— iS. 
Fig. 8. Discina Meekana, Whitfield., with shell partly preserved. 
Fig. 9. Under valve of same? 
Fig. 10. Orbiculoidea ? sp. Incorrectly drawn, the outline is not 
circular, but somewhat elliptical. Very likely the same species figured 
