104 • BULLETIN OF THE LABORATORIES 



PLATE III. 



Fig I. Crenipeden senilis, sp. n , left valve. 



Fig, 2. SphiferJuitiis, M. and W. ? 



Fig. 3. Platyceras, sp. 



Fig. 4. Streblopteria media, small right valve. 



Fig. 5. Aviculopecteji (cf. Oweni.) 



Fig. 6. Leiopteria, sp. 



Fig. 7. Avicidopecten, right valve. 



Figs. 8, 9. Streblopteria media, sp. n., left and right valve. 



Fig. 10. Limatuhna ohioensis, n. sp., left valve. 



Fig. II. Atrypa reticularis? 



Fig. 12. Hemipronites crenistrio?, young. 



Fig. 13. Chonetes, sp. 



Fig. 14. Chonetes pulchella, Win. 



Figs. 15, 16. Nuada, sp. ? 



Fig. 18. Productus arcuatus, H. 



Fig. 19. Ostracode crustacean. 



Fig. 20. Productus flemingi. 



Fig. 2 I . Chonetes illinoisensis. 



Fig. 22. Productus, sp. 



Fig. 23. Spirifer striatiformis, (cf. /////w, H.) 



Fig. 24. Pfoductella ? 



Fig 25. Productus 7iebrascensis. 



Fig. 26. Spirifer striatiformis, camera drawing of striae. 



Fig. 27. Pholadella newberryi, right valve. 



Fig. 28. Productus lachrymosus, var. stigmarius, H. 



Fig. 29. Hemipro7tites crenistria. 



Fig. 30. Promacrus truncatus, sp. n., dorsal view. 



Fig. 31. Avicidopecten newarkensis, Win. .' 



Fig- 3-- Hypostome of PhiUipsia shumardi? 



PLATE IV. 



Fig. I. See page 75. 



Fig. 2. Sangtnnohtes 7iaiadiformis. '^'^^ 



Fig. 3. Palceoneilo attenuata. 



Fig. 4. Pholadella nnvbcrryi. 



Fig. 1^. Edmondia ? 



Fig. 6. Myalina michiganensis. 



Fig. 7. Nucida, sp ? 



Fig. 8. Gramjnysia, imperfect cast. 



Fig. 9. Palcconeilo plicatella, small Individ u?il. 



Fig. 10. Modi la ivaverlyensis. 



