257 



11. Prasopora n. sp c 



12. Proboscina tumulosa Ulrich r 



13. Stigmatella n. sp aa 



14. Zygospira reeurvirostris (Hall) r-c 



9. In the collection from the Quarry in the crystalline layers at Prospect were 

 the following species: 



1. Cyrtodonta obtusa (Hall) r 



2. Arthoelema sp r 



3. Arthoelema cornutum Ulrich r 



4. Calymene senaria Conrad r-c 



5. Chasmotopora reticulata (Hall) c 



6. Crinoid segments a 



7. Dalmanella testudinaria (Dalman) r-c 



8. Hallopora goodhuensis (Ulrich) c 



9. Helopora quadrata Ulrich r 



10. Isostelus gigas de Kay c 



11. Mitoclema? mundulum Ulrich r 



12. Pachydictya acuta (Hall) c 



13. Pianodema subaequata (Conrad) r-c 



14. Platystrophia trentonensis n. sp ". c 



15. Plectambonites sericeus (Sowerby) r-c 



16. Prasopora n. sp c 



17. Prasopora sewyni (Nich.) c 



18. Rafinesquina alternata (Emmons) r-c 



19. Rhinidictya sp c 



20. Rhynchotrema increbescens (Hall) .r-c 



Trenton and Black River of the Patterson Quarries. 



At the east end of the quarries, about forty rods from the house of Joe 

 Jeffers, is the following section in descending order: 



6. Mesotrypa-Plectambonites bed, thin limestone. Trenton. 

 5. Strophomena bed, crystalline, massive limestone. 



Amsterdam Is. 

 4. Massive crystalline bed with some Strophomena, and containing 

 numerous light grey pebble-like masses of Stromatocerium and 

 Solenopora. The layer rests directly with a sutured contact upon 

 the Black river. Amsterdam Is. 



5084 — 17 



