Ravmoxd : The Chazy Formation and ris Fauna. 539 



D,j. Light-gray, thin-bedded, very fossiliferous doloniitic limestone. 

 Best exposed at the end of the ridge near the road. 



2 1 feet = i8o feet 6 inches. 



D,g. Very much like the preceding, but containing great numbers 

 of cystid fragments and many bryozoa. 9 feet = 189 feet 6 inches. 



Djj. Concealed. 10 feet =199 feet 6 inches. 



D,2- Compact, fine-grained limestone with few fossils. Sca/iics an- 

 gulatus occurs in the top layer only. 17 feet 6 inches =217 feet. 



Hebertclla exfoliata c, Scalites angtilatus r, 



Camerella varians r, Thaleops ovata r, 



Catnerella longifostris r, Leper ditia canadensis c, 



Raphistovia stamineum c, EurycJiilina latitnarginata r. 



Bucania sulcatina r, 



Dj^. Light-gray, coarse-grained, heavy-bedded limestone with nu- 

 merous fossils. 10 feet =227 feet. 



Monotrypella sp. r, hotel us Jiarrisi r, 



Phylloporiua unepta r, I I lie mis globosus c, 



Orthis aciitiplicata ? r, T/taleops ovata r, 



Hebertclla exfoliata c, Leperditia canadensis c. 

 Hebertclla vulgaris c, 



D,^. Covered. 30 feet =257 feet. 



Dj.. Two beds of reddish, coarse-grained crystalline limestone. 

 No fossils except -Leperditia canadensis. 3 feet =260 feet. 



D,g. Covered. 10 feet =270 feet. 



Dj^. Reddish, rather crystalline limestone full of fragments of trilo- 

 bites, principally Illcsnus. 10 feet =280 feet. 



On this section line, which follows the direction of Section I of 

 Brainerd and Seely's map, the strata are not well exposed above D^^ 

 of the present section, which eciuals A^ of Brainerd and Seely's sec- 

 tion. Twenty rods east of D^^ the Maclurites layers are encountered, 

 but the layers are not well exposed and collecting is difficult. One 

 hundred and twenty rods southeast of the good outcrop at D,.j is a low 

 ledge of very hard, dull-gray dolomite, from which the fossils can 

 not be extracted except by roasting the matrix. In this layer, Lopho- 

 spira subabbreviata, Lophospira perangulata, and along slender species 

 of Honiotonia are rather abundant. This is the same layer which is 

 encountered in section F (F^.,,), and is the C,_. of Brainerd and 

 Seely's section. 



