70 



NEW YORK STATE MUSEUM 



B-^.j. Impure, thin bedded fine grained limestone. 



1 6 feet 6 inches = 167 feet 6 inches 

 Bucania sulcatina, c 



Plaesiomys platys, c 

 Rafinesquina alternata, r 

 R. champlainensis, c 

 R. incrassata, rr 

 Camarella varians, rr 

 Raphistoma stamineum, r 

 R. striatum, rr 



Maclurites magnus, r 

 Ctenodonta peracuta, rr 

 Isotelus harrisi, r 

 Thaleops^ arctura,i rr 

 Leperditia limatula, c 



Concealed . 31 feet:=i98 feet 6 inches 



Btj-i6J Q-^12- Impure, rather shaly limestone interstratified with 

 heavy bedded, fine grained blue limestone. 



80 feet=278 feet 6 inches 



Palaeocystites tenuiradiatiis, c 

 Monotrypella sp., r 

 Rhinidictya fenestrata, rr 

 Plaesiomys platys, c 

 Rafinesquina alternata, c 

 R. champlainensis, c 

 R. incrassata 

 Camarella longirostris, r 



C. varians 



Ctenodonta peracuta, rr 

 C. dubiaformis, rr 

 Clionychia montrealensis, r 

 Archinacella ? deformata, r 

 A. ? propria, r 

 Eccyliopterus fredericus, r 

 E. proclivis, r 

 Raphistoma striatum, r 



Raphistoma stamineum, c 

 Eulcania sulcatina, c 

 B. bidorsata ?, c 

 Lophospira perangulata, r 

 L. sp. ind.j 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 



Q:s-i4- Very 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 

 'C15. One layer of coarse grained sandstone in which there are 

 many cavities, as though fossils had been dissolved out. 



2 feet=:305 feet 

 Cie- Hard, magnesian limestone containing many large water- 



worn sand grains. 



Plaesiomys platys, r 

 Camarella varians, r 



I foot =306 feet 



Raphistoma stamineum, r 

 Isotelus harrisi, c 



1 Dr Raymond cites this form as T h a 1 e o p s o v a t a , since at the time 

 he considered Hall's Illaenus arcturusasa synonym of Thaleops 

 o V a t a Conrad. He has, however, later [Ann. Carnegie Mus. v. 4, no. 3. 

 igo8, p. 248] separated again the Chazy and the Trenton forms, referring 

 Illaenus arcturus also to Thaleops. 



