506 Annals of the Carnegie Museum. 



silicified and of a jet black color. The more important beside Ma- 



cliirites are species of Ortliis,''^ Stropliomena ''■* and Orthoceras. 



2IO feet. 255 feet , 



4. Dark, compact, fine-grained limestone with obscure bedding, 

 weathering to a light gray. Fossils are infrequent, but at a single 

 locality '^" were collected: Kafiucs(]iii)ia incrassata, Isotelus canalis,'^ 

 Ceraiinis polydorus^-'^ EoJiarpes sp. und., Illcciiiis iiicertui,,''''^ Amphilichas 

 'uinganensis, Sphierexochiis parvus and several undetermined species. 

 20 feet. 275 feet. 



5. Bluish-black limestone like number 3, but less pure, containing 

 Afaclurites ?/iagiiiis, Orthis perveta, Rajitiesqiiiua it/crassafa, Heb- 

 ertclla boi-ealis. 



75 feet. 350 feet. 



Group C : Upper Chazy, 202 feet. 



1. Dove-colored compact limestone, in massive beds, containing 

 a large Orthoceras, Plio^nerops canadensis, Solenopora compacta, and a 

 large Bitcania. 



60 feet. 60 feet. 



2. Dark impure limestone, in thin beds, abounding in Caitiarotce- 

 chia plena ; at the base a bed 4 or 5 feet thick is filled with various 

 forms of Monticulipora or Stenopora. 



125 feet. 185 feet. 



3. Tough, arenaceous magnesian limestone, passing into fine- 

 grained sandstone. 



1 7 feet. 202 feet. 



A -f- B + C = 890 feet. 



Section at Croiun Point, Neii> York. 

 After Brainerd and Seely. 

 I. Sandstone and slate interstratified. 23 feet. 



( 2. Impure limestone containing Plicsiomys platys. 25 feet. 



B. Beds containing Macluritcs niagni/s. 200 feet. 



A 



\ 



'8 Ptissiowys philys. 



'8 Rafinesquiua cliainplainensis. 



20 This locality is at Bluff' Point. 



2' Isotelus liar r is i. 



22 Ceraurus pompilius. 



2^ lllanus ^lobosus. 



