36 POTTS VILLE FAUNA OF OHIO 



Marginifera muricata var. missouriensis Girty 



Marginifera wabashensis (Norwood and Pratten) 



Spiriferina kentuckyensis (Shumard) 



Spirifer opimus Hall 



Ambocoelia planoconvexa (Shumard) var. 



Composita subtilita (Hall) 



Edmondia sp. 



Leda bellistriata Stevens 



Parallelodon obsoletus (Meek)? 



Parallelodon sangamonensis (Worthen) 



Posidonia girtyi n. sp. 



Aviculopecten pellucidus Meek and Worthen 



Aviculopecten coxanus Meek and Worthen 



Euchondria neglecta (Geinitz) 



Pleurophorus tropidophorus Meek 



Astartella concentrica (Conrad)? 



Astartella sp. 



Schizostoma catilloides (Conrad) 



Pseudorthoceras knoxense (McChesney) 

 Orthoceras n. sp. 



Fish teeth 



BOGGS MEMBER 

 Stratigraphy and Extent 



The Boggs member is the next fossiliferous horizon above the 

 Lowellville limestone, and in ascending order forms the second lime- 

 stone of the Pottsville formation. It either directly overlies the Lower 

 Mercer coal (No. 3) or is separated from it by an interval of not 

 more than 3 feet. In Muskingum County it is found about 20 or 25 

 feet above the Lowellville limestone and about 22 feet below the Lower 

 Mercer limestone. In northern Tuscarawas County the latter interval 

 is increased to 34 feet, while at the southern extension in Scioto County 

 the average distance between the Boggs ore and the Lower Mercer 

 limestone is about 47 feet. The horizon has been traced from eastern 

 Scioto, western Lawrence, and Jackson counties on the south where its 

 appearance is patchy and uncertain, 1 northward through central and 

 western Muskingum County where it attains its greatest thickness. 2 

 It has also been observed in eastern Licking County, and has been 

 recorded as far north as northern Tuscarawas County. 3 



The Boggs member varies greatly in lithologic character from place 

 to place. In Scioto, Lawrence, and Jackson counties, the horizon is 

 marked only by iron ore irregularly bedded in shales. It is found in 



iStout, W., Geol. Surv. Ohio, Fourth Ser., Bull. 20, pp. 141, 292, 567, 1910. 

 2 Stout, W., Geol. Surv. Ohio, Fourth Ser., Bull. 21, pp. 70-75, 1918. 

 3 Orton, Edward, Geol. Surv. Ohio, Vol. V, p. 68, 1884. 



