Raymond: Thk Chazy Formation and its Fauna. 501 



Section at Chazy, New York. After Brainerd and Seely. 

 Group A : Lower Chazy, 310 feet. 



1. Iron gray, fine-grained, dolomitic limestone in beds one to two 

 feet in thickness, weathering to chab, with fine yellowish streaks at 

 right angles to the plane of bedding. Containing Ortliis costalis' and 

 crinoidal fragments. 



1 10 feet. 1 10 feet. 



2. Tolerably fine limestone filled with fragments of crinoids, con- 

 taining Orthis"^ zxid^ Rafinesquiiia. 



20 feet. 130 feet. 



3. Measures concealed. 



40 feet. 170 feet. 



4. Measures of impure limestone filled with Ortliis^ at bottom, thin- 

 bedded when long exposed to the weather, the upper six feet abound- 

 ing in crinoidal fragments. 



30 feet. 200 feet. 



5. Fine-grained massive limestone containing Scalites aiigi/la/i/s, 

 Raphistovia, and fragments of trilobites. 



25 feet. 225 feet. 



6. Impure limestone abounding in Ortliis.^ 



10 feet. 235 feet. 



7. Measures concealed. 



25 feet. 260 feet. 



8. Massive gray limestone, largely made up of crinoidal remains, 

 having red spots in the stratum about ten feet from the top ; abound- 

 ing in gastropods^ near the middle. 



50 feet. 310 feet. 



Grouj) B: Middle Chazy, 265 feet. 

 I. Thick-bedded, nodular, dark-colored limestone, containing 

 Alachirites magniis. 

 50 feet. 50 feet. 



^Probably Hebeitella exfoliata, but ^o%%\h\-^ Hebei tella vulgaris. In the follow- 

 ing sections and lists taken from the works of Messrs. Brainerd and Seely, Logan, 

 Ells, Billings, and Ami, I have brought the generic names down to date and have also 

 noted the fact, when the identifications seem in the light of recent work to be 

 faulty. 



3 Probably HeherteUa. 



* Hehertella. 



5 Raphistoma stamineum and Lophospira subabbreviata. 



