32 



BULLETIN OF THE LABORATORIES 



Falls, 80 feet below the carboniferous conglomerate to that layer, we 

 find a series of shales, &c., generally unfossiliferous, but containing 

 two horizons, from which many species have been obtained. The first 

 horizon, from which over thirty-five species have been figured in Bulle- 

 tin Vol. IV, of Denison University, is forty feet below the carboniferous 

 conglomerate, the second is exposed in the series of shales and free- 

 stones of which the stratum forming the Big Falls is the top. Alloris- 

 ma Cuyahoga and a species of Chonctes are the only species thus far 

 obtained from that horizon. These zones are probably equivalent to 

 divisions II and III of Licking County. We have seen that the 

 Waverly shale, disappears at Shade Creek, north of Wooster, and con- 

 sequently we should not expect to see it here. The concretionary zone 

 (I4) has lost its lithological character here and has probably thinned 

 out. judging from tJie relative position it holds at Richfield its horizon 

 would be under the Big Falls, More collecting will have to be done 

 before anything definite can be said as to its position here. The Berea 

 shale, which extends almost to the Big Falls, is very different, both 

 lithologically and palaeontologically from the Cuyahoga shale proper. 

 Five species have been obtained in this portion of the series, which 

 are illustrated in Volume IV, Bulletin of Denison University, Plate 

 X, Figs. 29, 30, 31, 32, 33. It will be seen by referring to that plate, 

 that the portion above the falls has nothing in common with this shale, 

 which is eciuivalent to a portion of division I3. The Berea grit and 

 Bedtbrd shale are respectively equivalent to 1 2 and Ii of Licking 

 County. 



