259 



9. Dalmanella testudinaria (Dalman) r-c 



10. Escharopora confluens Ulrich c 



11. Escharopora? limitaris Ulrich r-c 



12. Escharopora recta Hall c 



13. Escharopora subrecta (Ulrich) c 



14. Liospira subtilistriata (Hall) r 



15. Mesotrypa whiteavesi (Nicholson) a 



16. Mitoclema? mundulum Ulrich r-c 



17. Nematopora ovalis Ulrich r-c 



18. Pachydictya acuta (Hall) c 



19. Pachydictya fimbriata Ulrich r-c 



20. Pachydictya pumila Ulrich c 



21. Phaenopora incipiens Ulrich r-c 



22. Platystrophia trentonensis n. sp r-c 



23. Plectombonites sericeus (Sowerby) a 



24. Prasopora simulatrix Ulrich r-c 



25. Rafinesquina alternata (Emmons) rr 



26. Rhinidictya mutabilis (Ulrich) c 



27. Rhinidictya paupera Ulrich r-c 



28. Rhynchotrema increbescens (Hall) r-c 



29. Solenopora compacta (Billings) aa 



30. Stictoporella cribrosa Ulrich c 



31. Stromatocerium canadense Nicholson and Murie c 



32. Strophomena incurvata (Shepard) aa 



The collection from the Black river of the Pattersonville section (Lower 

 Amsterdam) formation, contains the following species: 



1. Batostoma supberbum (Foord) a 



2. Batostoma varium Ulrich aa 



3. Calymene senana Conrad a 



4. Ceramoporella interporosa Ulrich r 



5. Columnaria halli Nicholson a 



6. Crinoid segments a 



7. Eridotrypa aedilis minor (Ulrich) r 



8. Escharopora subrecta (Ulrich) c 



9. Isotelus gigas de Kay r 



10. Lichenalia sp r 



