680 J. W. BEEDE BEDS OF APPALACHIAN AND WESTERN SECTIONS 



Genera and species Genera and species 

 of Amphibia. of Reptilia. 



Genera. Species. Genera. Species. 



Permian 



16 

 11 



Total 22 



1 

 4 

 1 

 23 

 10 

 S 



Total 47 



26 

 15 



39 



1 



6 



1 



51 



17 



10 



S6 



27 



93 



41 

 35 



Locality and horizon. 



Texas, Clear Fork. 

 Oklahoma-Texas, Wichita. 



35 57 



Pennsylvanian 

 1? 1? 



3 



2 

 1 

 

 



Kansas, Louisville, base of 

 Elmdale? 



Illinois, Danville, Cone- 

 ma ugh ? 



West Virginia - Pennsylvania, 

 Conemaugh. 



Linton, Ohio, top of Alle- 

 gheny. 



Nova Scotia, top of Alle- 

 gheny ? 



Mazon Creek, Illinois, base 

 of Allegheny ? or ~ top of 

 Pottsville. 



Of the genera of Pennsylvanian Amphibia, four continue into the Per- 

 mian, as do three of the seven genera of Reptilia. 



From this table it is apparent that the first known vertebrate fauna 

 was a purely amphibian fauna, from the basal Allegheny or top of the 

 Pottsville. The first known reptile, Eosauravus, occurs in the Linton 

 coal of Ohio, in the top of the Allegheny series. Later two reptilian 

 forms are known from the Conemaugh of Pennsylvania and West Vir- 

 ginia, and three are known from the Danville, Illinois, beds of uncertain 

 age. It is at present impossible to ascertain with certainty the age of 

 these last beds. However, the writer is of the opinion — largely unsub- 

 stantiated as yet — that the Danville material is of no later age than the 

 Conemaugh, but fortunately it preserves a somewhat more complete pic- 

 ture of the air-breathing vertebrates of that time than do the Pennsyl- 

 vania-West Virginia remains. There is also one amphibian and probably 

 a reptile from the upper Pennsylvanian of Kansas. The wealth of ma- 

 terial from Nova Scotia described by Dawson is probably very near the 

 horizon of the Linton, Ohio, fauna. 



In all these Pennsylvanian forms there are 47 genera and 86 species 

 of Amphibia known from the Pennsylvanian and only 7 genera and ? 



