Raymond : The Chazy Formation and its Fauna. 503 



10. Same as No. 8. 



32 feet. 1 18 feet. 



1 1. Measures concealed. 



7 feet. 1 25 feet. 



12. Tough, impure limestone. 



8 feet. 133 feet. 



13. Measures concealed. 



24 feet. 157 feet. 



A + B + C = 732 feet. 



The Isle La JSTotte Section. 

 At Isle La Motte, Vermont, Brainerd and Seely took the following 

 section : 



1. Layers of slate containing Li/ign/a' and Orthis.^ 



23 feet. 23 feet. 



2. Silicious limestone with s ams of tough slate containing Came- 

 rel/a hreviplicata,'' Clitanihouites porcia, Strophovioia aitrora,^^ Raji- 

 nesgi/ina camerata,^^ Zygospira ? acutirostris, Asapliiis canalis,^'' Pseitdo- 

 spluerexochus vukatius, lUcenus crassicauda,''^ Remopleiirides schlo- 

 thciiiii}'' 



55 feet. 78 feet. 



3. Massive beds crowded with Orthis costalis (probably Hebertella 

 exfoliata ) . 



75 feet. 153 feet. 



4. Crinoidal beds with layers of univalves and the layers of red- 

 spotted marble. Stylanca parva occurs near the top. 



70 feet. 223 feet. 



" The Maclurea beds that follow are like those of the preceding sec- 

 tion, but of less thickness. 



" The upper portion of Group B is assimilated at Isle La Motte to 

 the lower portion of Group C. It consists of dove-colored, fine-grained 

 limestone, almost devoid of bedding, rarely containing Maciitrites 



"^ Lingtila braitierdi. 



* Oithis actdiplicata. 



8 Probably Canierella varians. 



'" Probably Rafinesquina incrassata. 



" Probably Rafinesquina incrassata. 



'^ Probably Isoteltis harrisi. 



'3 Probably Illantis erastusi. 



** Probably RemopUtirides canadensis. 



