Mercer Limestone in Newark-Zanesville Region 291 



Fossils collected from the gray calcareous shale which lies just 

 above the Mercer limestone : 



Lophophyllum profundwn (Milne-Edwards and Haime) 



Glossina ivaverlyensis Herrick 



Orhiculoidea convexa (Shumard) 



Orhiculoidea missouriensis Shumard 



Orthothetes crassus (Meek and Hayden) 



Chonetes mesolobus Norwood and Pratten 



Productus semireticulatus (Martin) 



Produdus cora d'Orbigny 



Productus longispinus Sowerby 



Productus nebraskensis Owen 



Dielasma cf. turgiduni (Hall) 



Spirifer camaratus Morton 



Spirifer rocky mordanus Mareou 



Reticularia perplexa (McChesney) 



Seminida argentea (Shepard) 



Edmondia ovata Meek and Worthen 



Edmondia nehrascensis Geinitz 



Leda bellistriata Stevens 



Yoldia stevensoni Meek 



Parallelodon carhonarius Cox 



Parallelodon tenuistriatus Meek and Worthen 



Parallelodon ohsoletus Meek 



Aviculopinna americana Meek 



Myalina swallovi McChesne}'^ 



Aviculopecten coxanus Meek and Worthen 



Acanthopecten carhonijerus (Stevens) 



Pecten {Entolium) aviculatus (Swallow) 



Allorisma sp. 



Pleurophorus oblongus Meek 



Cypricardinia carbonaria Meek 



AstorteUa vera Hall 



Astartella newberryi Meek 



Astartella varica McChesney 



Dentalium sublaeve Hall 



