The Rogers Gap Fauna of Central Kentucky 111 



ena vicina, and Stroniatocerium (forms found also at and immedi- 

 ately below the Brannon limestone), in association with Hebert- 

 ella frankfortensis and Rhynchotrema increhescens, forms ranging 

 upward from the lower part of the Wilmore, through the Bigby 

 and Benson members, to the Cornishville limestone. To the group 

 of strata including the Faulconer, Salvisa, and Cornishville lime- 

 stones Prof. Arthur M. Miller gave the name Perryz'ille, with the 

 Salvisa limestone as its most characteristic member. 



Subdivisions of the Cynthiana formation. 



A. Flanagan northward to Paris, Millersburg, 



Carlisle, and Pleasant \^\lley. 



Along the railroad, north of Flanagan, the Flanagan chert and 

 the overlying coarse-grained Benson limestone is exposed. About 

 two miles from Flanagan, on the west side of the railroad. Anon- 

 ychia -Ranaganensis is very abundant in strata, which are regarded 

 as the base of the overlying Cynthiana formation. The richly 

 fossiliferous strata of the latter, containing Orthorhynchida lin- 

 neyi, are exposed at numerous localities farther northward, until, 

 at Winchester, they are overlaid by more even bedded argillaceous 

 limestones, more frequently interbedded with clay and containing 

 a somewhat different fauna. (For AU onychia see pi. II, fig. 1.) 



Anonychia -Ranagancnsis is common also three miles north of 

 Paris, south of Xew Forest station, the upper part of the Benson 

 limestone, with a possible trace of the overlying Salvisa bed, being 

 exposed at a lower level along the pike, southwest of Myall sta- 

 tion. Northward, toward Millersburg, this AUonychia horizon is 

 overlaid by the same richly fossiliferous strata, containing Ortho- 

 rhynchida, as north of Flanagan. In the lower part of these strata, 

 between Xew Forest station and the overhead bridge two miles 

 south of Millersburg, Colnmnaria and Stroniatocerium are abun- 

 dant locally. (For Colnmnaria see pi. IV.) 



The OrthorJiyncJiiila fauna is abundantly exposed along the 

 railroad also northeast of Millersburg; but, a mile from Carlisle, 

 in a quarry west of the railroad, and south of the tunnel cut, a 



