242 The American Geologist. April, 1900 
In the black lime and the Flint Ridge above it, the speci- 
mens are relatively small but cannot be otherwise distin- 
guished. 
* 1 9. Spirifer opimus Hall. 
There are a number of specimens which seem to agree with 
S. opimus in the limestone below the shale as well as in still 
higher horizons but we cannot be certain that they are not 
the young or small forms of S. striatus with which they are as- 
sociated. 
20. Spirifer fiiltoncnsis Meek? 
21. RyncJionella sp. 
Lamellibranchiata. 
*22. Astartella newberryi Meek. 
*23. Astartella varica McChesney. 
*24. Aviculopecteti scalaris Herrick. 
^25. Aincidopecten occidentalis Win? A large species is 
represented by mere fragments. 
*26. Crcnipectcn foersti Herrick. 
*2']. Lima retifera Shumard. 
28. Edmo?i(Ma 7tebrasce?isis Geiniz? 
29. Macrodon carbonaria Con. 
Heteropoda. 
*30. Bcllerophon crassiis M. and W. (?) 
Pteropoda. 
31. Comdaria sp. 
Crustacea. 
32. PJiillipsia sp. 
A small trilobite is represented by pygidia alone and al- 
though it is undoubtedly new it does not seem to us desirable 
to name forms in this genus upon pygidial characters only. 
