262 
low the Canajoharie shale contact, but are common throughout the upper 10 
feet. In the layers of hard limestone just below the Canajoharie (Utica) 
shale Cryptolithus is common and about the only fossil. Plectambonites 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: 
Jp bollasupacauataWniGh, cr.) een me 2 ern a eee r-¢ 
Zee Calymene Senaria “COnTAGS +. eon eee se 1h nee eee c 
a: »Ohasmopopora: reticulata (Hall). . 2s. ae eee r-¢ 
4) Chasmotoporasuplaxa (Wirich)= . = ss. cece, ee ee r-¢ 
Dee ONIMOId: SCCMOEMUBS--.& Tis hos ee lh eae ee ee a 
G) “Cryptolithus tessellatus “Green. .0. 002.0 al eee r-¢ 
io @ytherellar Tug Osan) ONGS))s stnesir cieuon en hee ete eee 1 
S$. Dalmanella testudinaria (Dalman):.......\..0...:..-:. o 
OP ew Eridotryparacdius minor rien) ie oe se eee eae C 
LO MHMIidotry Pacxioia Orci 4. 6. Gn. cnet er r-¢ 
IETS TSOtelus eIPas 1 ayes eee ely ayes oe nace eee c 
Is Wheperditiatapulites:(Conrad)iane. se. 76 se eee @ 
13. Mesotrypa whiteavesi (Nicholson).................. aa 
145 Mitocdenay nmnindulnmsW Irian 1. eee r-¢ 
15: = Mono try pans Speers eee chee eee ne ete oe eer nee aa 
63S Nematopora Ovals lich. clematis eee pees r-¢ 
ive “Pachydictyaracita (ital). Saek ce nook tee eee re eee Cc 
iS!) Pachydictya pumila Wilrich ec seca oe eee Cc 
