28 BULLETIN OF THE LABORATORIES 



erate I is sufificient to indicate its presence. The nodule layer is well 

 exposed here and is rather fossiliferous, at the same time, some of its 

 species which are characteristic of that horizon in Licking County, do 

 not occur here, and vice versa. It may be well to illustrate this point 

 more clearly. At Moots' Run the characteristic species are Spirifer 

 marioucnsis, Phillipsia pnEciirso?', Strcbloptcria fragilis and Pteriuopecten 

 cari/ii/crus, in Ashland County, Hanover Township. Phillipsia prceciir- 

 sor and several other more uncommon forms have disappeared and 

 some new species have taken their place, as Pierinopecien ashlandensis, 

 and Lewrhynchus ? ricJdandensis, while Hemipronites ccnistna and Spiri. 

 fer ? tenuispinatis, which are scarce at Moots' Run, are very abundant 

 here. The concretionary zone is about 250 feet below the Carbon- 

 iferous conglomerate in Licking County, while in Ashland County it 

 is only 200 feet. At Wooster, Ohio, the following section was ob- 

 tained along Christmas Run and in Reddigs Quarry, immediately 

 north of the city. 



Dark sandstone, 

 Conglomerate II, 

 Freestone, 

 Conglomerate I, 

 Shales, &c. , 

 Concretionary shale. 



The strata lying on top of conglomerate II are not very well 

 exposed, but one species {Discina magnifica) which occurs in IIIi, in 

 Hanover township, is found immediately over conglomerate II i. It 

 would be impossible to draw any line between IIIi, and III2, so that 

 the former will be considered a part of III 2. The top of division two 

 or 1 1 2, which is exposed in Ashland county, has no equivalent here, 

 and III is sparingly fossiliferous. Lyringothcris caricri, which is so 

 abundant farther south, was not found at this place. The nodule layer 

 can be very easily correlated with its equivalent in Ashland County, 

 but bears the same relation to that outcrop as exists between the first 

 two exposures mentioned. Our collections seem to indicate that 

 Pteriuopecten ashlandensis and Alhyris ashlandensis have disappeared, 

 while Pterinopecten cariniferiis and Lyriopecten nodocostatus are very 

 rare. Spinier tnationensis, Mytilarca fibristriatus, and Poisidomya 



