70 



XEW YORK STATE MUSEUM 



Bj .J. Impure, thin bedded fine grained limestone. 



i6 feet 6 inches = 167 feet 6 inches 



Plaesiomj-s platys, c 

 Rafinesquina ahernata, r 

 R. champlainensis, c 

 R. incrassata, rr 

 Camarella varians, rr 

 Raphistoma stamineum, r 

 R. striatum, -rr 



Bucania sulcatina, c 

 Maclurites magnus, r 

 Ctenodonta peracuta, rr 

 Isotelus harrisi, r 

 Thaleops arctura,i rr 

 Leperditia limatula, c 



Concealed 31 feet^iQS feet 6 inches 



Btf^isj Q-ii- Impure, rather shaly limestone interstratified with 

 heavy bedded, fine grained blue limestone. 



80 feet: 



.2'jZ feet 6 inches 



Palaeccystites tenuiradiatiis, < 

 Monotr3-pella sp., r 

 Rhinidictya fenestrata, rr 

 Plaesiom3's platys, c 

 Rafinesquina altemata, c 

 R. champlainensis, c 

 R. incrassata 

 Camarella longirostris, r 



C. varians 



Ctenodonta peracuta, rr 

 C. dubiaformis, rr 

 Clionj'chia montrealensis, r 

 Archinacella ? deformata, r 



A. 



propria, r 



Raphistoma stamineum, c 

 Bulcania sulcatina, c 

 B. bidorsata ?, c 

 Lophospira perangulata, r 

 L. sp. ind., r 

 Maclurites magnus, c 

 Orthoceras sp. ind., r 

 Plectoceras sp. ind., r 



Bathyurellus minor, r 

 Isotelus harrisi, c 

 I. obtusus, r 

 Thaleops arctura, r 

 Pliomerops canadensis, rr 

 Leperditia canadensis, c 

 L. limatula, c 

 Eurychilina latimarginata, r 



Ecc3-liopterus fredericus, r 

 E. proclivis, r 

 Raphistoma striatum, r 



Q:^'U- ^'ery hard, blue gray magnesian limestone, weathering so 

 as to show alternating light and dark stripes about an inch wide. 



24 feet 6 inches^303 feet 

 C^g. One layer of coarse grained sandstone in which there are 

 many cavities, as though fossils had been dissolved out. 



2 feet=r305 feet 

 Cjs- Hard, magnesian limestone containing many large water- 

 worn sand o^rains. 



I foot^3o6 feet 



Plaesiomj^s platys, r 

 Camarella varians, r 



Raphistoma stamineum, r 

 Isotelus harrisi, c 



1 Dr Raymond cites this form as Thaleops ovata, since at the time 

 he considered Hall's Illaenus arcturusasa synorr\-m of Thaleops 

 ovata Conrad. He has, however, later [Ann. Carnegie Mus. v. 4, no. 3. 

 1908, p. 248] separated ?gain the Chazy and the Trenton forms, referring 

 Illaenus a r c tu r u s also to Thaleops. 



