Raymond : The Chazy Formation and its Fauna. 515 



Aj,. One bed of dark-blue, very compact bmestone. 



8 feet = 373 feet 9 inches. 

 A.^.,. Heavy-bedded, blue limestone, containing silicified fossils. 



18 feet := 391 feet g inches. 



Bolboporites aiuericaniis r, 

 Phvsioiiiys platys c, 

 Hebertella sp. r, 

 Rafiiiesqiiina alfcniata r, 

 Rafinesijiiina chaiiiplaincusis r, 

 Ca mere I Id lougirostris c, 

 Zygospira aciitirostris r, 

 Eiidodesnia traiiceps c, 

 Lophospira sp. ind. r, 



LouchothniHis Jialli c, 

 Asapluis alpha r, 

 Asaphus beta c, 

 Isoteliis Iiarrisi r, 

 Jllicniis glob OS us c, 

 Pterygoiiietopus anniilaius r, 

 Leperditia canadensis c, 

 Leperditia liniatula r, 

 Eiirychilina latiinargiiiaia r. 



Machirites ma gnus c, 



Ajj. Like the preceding, but the fossils are not silicified. 



41 feet = 432 feet 9 inches. 



A^^. Blue, heavy-bedded, somewhat im[)ure limestone, containing an 



zkiw'sx^d.wc^ oi Alaclurites magnus. This zone extends to the beginning 



of the little cove where it is possible to descend to the water's edge. 



18 feet = 450 feet 9 inches. 



Trochonema hudsoni r, 

 j\fac hi rites niagnns c, 

 Isotelus karri si r, 

 Thaleops ovata r, 

 Leperditia canadensis r, 

 Leperditia liniatula r. 



Unidentified coral c, 

 Paleocystites temiiradiatus c, 

 Rhinidictya fenestf-ata c, 

 Monottjpella sp. c, 

 Plcesioniys platys r, 

 Camerella varians r, 

 Rafinesquina chanplainensis r, 



A.^.. Rock about the same as the preceding. Fossils not abundant 

 and very difficult to extract. 21 feet 6 inches = 472 feet 3 inches. 



Ajg. Heavy-bedded, blue-gray, impure limestone, containing large 

 black silicified fossils. This zone seems to correspond to the middle 

 of Bj of Brainerd and Seely's section. 



iS feet 6 inches = 490 feet 9 inches. 



Hebertella vulgaris r, Ortlwceras sp. und. r, 



Rafinesquina champlainensis c, Illcenus erastusi r, 



AmbonycJiia curvata r, Leperditia canadensis c, 



Machirites magnus c, Euryc/iilina latiniarginata r. 

 Lophospira perangulata r, 



