262 



low the Canajoharie shale contact, lint are common throughout the upper I(J 

 feet. In the layers of hard limestone just below the Canajoharie (Utica) 

 shale Cryptolithus is common and about the only fossil. Pleetambonites is 

 common in the upper thin Trenton. 



At the Amsterdam waterworks just north of the city of Amsterdam, 

 Mesotrypa whiteavesi (Nicholson) and Cryptolithus tessellatus Green are 

 very abundant 10 feet or more below the top of the exposed Trenton. The 

 portion outcropping extends almost to the top of the Trenton formation, but 

 the contact with the Canajoharie shale is not shown. The creek flows in a 

 syncline for some distance below the dam. 



At the Barge canal dam across the Mohawk river just above Amsterdam 

 station, there is a quarry, mentioned by Prof. E. R. Cummings, in the New 

 York State Museum Bulletin No. 34, as showing a splendid section of the 

 Birdseye, Lowville and Black river. The latter is of the same general char- 

 acter as at Pattersonville, being black, fossiliferous and thin-bedded. The 

 most abundant fossils are Streptelasma (Petraia) profundum Conrad and 

 Stromatocerium canadense Nicholson & Murie. 



The following species were collected at Morphy's creek from the Trenton 

 layers : 



1. Bollia subaequata Ulrich r-c 



2. Calymene senaria Conrad c 



3. Chasmotopora reticulata (Hall) r-c 



4. Chasmotopora sublaxa (Ulrich) r-c 



5. Crinoid segments a 



6. Cryptolithus tessellatus Green r-c 



7. Cytherella? rugosa (Jones) r 



8. Dalmanella testudinaria (Dalman) c 



9. Eridotrypa aedilis minor (Ulrich) c 



10. Eridotrypa exigua Ulrich r-c 



11. Isotelus gigas de Kay c 



12. Leperditia fabulites (Conrad) c 



13. Mesotrypa whiteavesi (Nicholson) aa 



14. Mitoclema? mundulum Ulrich r-c 



15. Monotrypa n. sp aa 



16. Nematopora ovalis Ulrich r-c 



17. Pachydictya acuta (Hall) e 



18. Pachydictya pumila Ulrich c 



