Mercer Limestone in Newark-Zanesville Region 285 



Edmondia nebrascensis Geinitz 



Leda bellistriata Stevens 



Yoldia stevensoni Meek 



Parallelodon carbonarius Cox 



Parallelodon tenuistriatus Meek and Worthen 



Parallelodon obsoletus Meek 



Schizodus cuneatus Meek 



Schizodus curtus Meek and Worthen 



Aviculopeden coxanus Meek and Worthen 



Aviculo'pecten occidentalis (Shumard) 



Aviculopeden cf. fasciculatus Keyes 



Acanthopecten carboniferus (Stevens) 



Peden {Entolium) aviculatus (Swallow) 



Liyna retifera Shumard 



Pleurophorus tropidophorus Meek 



Pleurophorus oblongus Meek 



Pleurophorus subcostatus Meek and Worthen 



Astartella vera Hall 



Astartella newberryi Meek 



Astartella varica McChesney 



Bellerophon crassus Meek and Worthen 

 Bellerophon percarinatus Conrad 

 Euphemus carbonarius (Cox) 

 Bucanopsis montjortiana Norwood and Pratten 

 Soleniscus klipparti Meek 



Phillipsia trinucleata Herrick 



Crinoid segments 



Flint Ridge Four Corners. A little more than a mile east of the 

 four corners near the coal drift another road from the north crosses 

 the Flint Ridge road at what is known as Flint Ridge Four Cor- 

 ners. Just south of here on the road toward Brownsville a large 

 block of fl.nt may be seen at the side of the highw^ay, and some- 

 what farther south the Mercer limestone is shown in the gutter. 

 The following section was measured : 



