268 Forty-sixth Report on the State Museum. 



ceous shales, considerably iron stained, containing principally Cho- 

 netes. Above these shales are the fine argillaceous ones again. 



Fauna of No. 499 D. 



Ambocoelia umhonata, Conrad. 



JRhynchonella prolifica, Hall. 



Chonetes, sp. 



Productella, sp. 



NucuUtes ohlongatus, Conrad. 



NucuUtes triqueter, Con. (?). 



Nucula hellistriata Con. (?). 



Grammy sia sp. 



Orthoceras sp. 



Goniatites sp. 



Dumb-bell fucoid. 



No. 499 F. Exposures on West Creek, southwest of Brookfield. 

 At the base of the section (F') ten feet of coarse argillaceous shales, 

 which on weathering split up into rather large pieces. The fossils are 

 not so abundant as in the finer shales, but the species are mainly the 

 larger forms. The list for No. 499 F' is: 



JSTucleospira concinna, Hall. 



Amhocoelia um,honata, Conrad. 



Athyris spiriferoides, Eaton. 



Liorhynchus multicosta, Hall (?). 



Spirifer medialis, Hall (?). 



Orthis cf. Penelope, Hall. 



Mhynchonella prolifica, Hall. 



Actinopteria decussata, Hall. 



NucuUtes JVyssa, Hall. 



Mbdio9norpha complanata, Hall. 



Pterinea Jlabellum, Conrad. 



JVyassa arguta, Hall (?). . 



Grammysia sp. 



Platyceras sp. 



Pleurotomaria sp. 



Orthoceras sp. 



For 100' the bank is covered by drift and soil, then there is an 

 exposure of coarse arenaceous shales and thin sandstones which has 

 been worked to some extent as a quarry. Tropidoleptics carinatus, Con. 

 is very abundant and the complete fauna of No. 499 F" is as follows: 



Tropidoleptus carinatus^ Conrad. 



Nucleospira concinna, Hall. 



