274 Forty-sixth Report on the State Museum. 



Phacops rana, Green. 



No. 501 D^. Exposures on lot No. 6, near tlie top of one of the 

 highest hills in southwestern Brookfield. The rooks consist of coarse 

 arenaceous shales, alternating with more argillaceous shales which con- 

 tain many specimens of Chonetes coronata, Conrad. The following 

 species were collected at this locality: 



Chonetes coronata, Conrad. 



Tropidoleptiis carinatui, Conrad. 



Spirifer medialiSy Hall. 



Spirifer mucronatus, Conrad. 



Chonetes coronata, Con. var. syrtalis Con. 



Amhocoelia umhonata, Conrad. 



JRhynchonella congregata, Conrad (?). 



A half mile further north by the roadside and near the top of the 

 hill are arenaceous shales, not so coarse as those of D^, which contain 

 an abundance of fossils in some layers. The following species were 

 collected at No. 501 D^. 



Tropidoleptiis carinatus, Conrad. 



Bpivifer medialis, Hall, one specimen with a groove in the mesial 

 fold. 



Spirifer granulifer, Hall (?). 



501 A. Exposures on Beaver Creek, near the boundary between 

 Brookfield and Columbus. A small quarry has been opened in this 

 rock, but not worked to any extent. The rock consists entirely of an 

 argillaceous, fine grained sandstone which weathers to a yellowish- 

 brown, in some cases breaking up into quite regular blocks, which can 

 be used for rough building purposes. The rock is evenly bedded in 

 layers from ^-inch to a foot or more in thickness. Some of the strata 

 are very fossiliferous, a single stratum of the lower layers, A^, con- 

 taining the following species in great abundance: 



Spirifer medialis^ Hall. 



Mhynchonella prolijica^ Hall. 



Streptorhynchus Chemung ensis^ Conrad. 



In the layers fifteen feet higher A^, several species were found which 

 were not noticed in the lower, as : 



Tropidoleptus carinatiis, Conrad. 



Spirifer granulifer, Hall. 



Amhocoelia um,honata, Conrad. 



On a single slab six inches square are good specimens of Tropido- 

 leptiis carinatus, Conrad; Spirifer medialis, Hall; Rhynchonella 

 prolifica. Hall, and Streptorhynchus Chemungensis, Conrad 



