REPORT OF THE STATE PALEONTOLOGIST 1902 991 



This important faunal change with the incoming of the Wolf 

 creek conglomerate, taken in connection with the fact that on 

 stratigraphic grounds, the equivalent of the Waverly of Ohio, 

 of Subcarbonic age, is pretty certainly present in this quad- 

 rangle, and in connection with the fact that the fauna of the 

 conglomerate and higher beds contains a small Subcarbonic ele- 

 ment, would indicate that the bed might be provisionally 

 adopted as the base of the Subcarbonic in the quadrangle. Of 

 the 128 species collected, 60 species occur below the Wolf creek 

 conglomerate only, 59 species occur above the same horizon 

 only, and nine are common. Of the 59 species occurring 

 above the conglomerate, seven species can be referred to the 

 Lower Carbonic. These are Ctenodus flabelliformis, 

 Gyracanthus sherwoodi, Oehlertella pleurites, 

 Orthothetes crenistria, Glossites (Sanguino- 

 lites) amygdalinus?, Sphenotus aeolus? and 

 Crenipecten winchelli. The stratigraphic significance 

 of the abundant Ptychopteria fauna, so highly characteristic of 

 zones 8 and 7, is not fully understood, as its stratigraphic rela- 

 tionships have not been fully worked out. It must be admitted 

 that the positive evidence is scanty and in itself hardly sufficient 

 to establish a boundary line between the Devonic and Carbonic 

 at the base of the Wolf creek conglomerate, but in a case like 

 this, where the stratigraphic evidence warrants the conclusion 

 that such a boundary line exists, this evidence seems sufficient 

 to give it a provisional location. Further than this it would be 

 hardly safe to go. If this location be not accepted, there seems 

 to be no paleontologic ground for such a boundary line at all 

 below the Olean conglomerate. 



Of the remaining zones, no. 5 is almost barren of fossils, no. 4 

 is a thin limestone in which Camarotoechia allegania 

 Williams, makes its advent. This species is specially abundant 

 in no. 3 and highly characteristic of it. A few fragmentary re- 

 mains of a Camarotoechia and an obscure pelecypod or two were 

 found in fragments of Olean conglomerate, hitherto supposed to 

 be nonfossiliferous. 



The species of fossils found in and below the Wolf creek con- 

 glomerate are all marine. The presence of Holoptychius and 

 Bothriolepis scales in no. 7 would indicate fresh or brackish 



