272 POTTSVILLE FAUNA OF OHIO 



Remarks. Temnocheilus forbesianus is represented in the collec- 

 tions studied by several fragments of the outer volution which preserve 

 fairly well the characters of the surface and show the outline of the 

 cross section of the volution. 



Horizon and locality. Boggs member: Muskingum County, Lo- 

 cality 26, r. 



Genus Ephippioceras Hyatt 

 Ephippioceras sp. 



Description. A crushed fragment near the living chamber of an 

 individual belonging to the genus Ephippioceras was obtained from the 

 Lower Mercer limestone of Muskingum County. The species is much 

 larger in size than E. ferratus, and is probably comparable in this 

 respect to E. divisus. The sutures, which are sharply marked, are 

 similar to those of the latter species. Specific determination, however, 

 is impossible from the scanty material at hand. 



Dimensions. Width of volution near living chamber (almost 

 complete) 90 mm., length of fragment 80 mm. 



Horizon and locality. Lower Mercer: Muskingum County, Sym- 

 mes Creek, Locality 29, r. 



PHYLUM ARTHROPODA 



Class Crustacea 



SUBCLASS TRILOBITA 



Genus Phillipsia Portlock 

 Phillipsia sangamonensis Meek and Worthen ' 



1865 Phillipsia (Griffiihidesl} Sangamonensis. Meek and Worthen, Proc. Acad. Nat. 



Sci. Phil., p. 271. 



Upper Coal Measures: Springfield, Illinois. 

 1873 Phillipsia (Griffithidesl] Sangamonensis. Meek and Worthen, Geol. Surv. 111., 



Vol. 5, p. 615, PI. 32, Fig. 4. 



Upper Coal Measures: Springfield, Illinois. 

 1915 Phillipsia sangamonensis. Girty, U. S. Geol. Surv., Bull. 544, p. 265, PI. XVIII, 



Figs. 10-13a. 



Wewoka formation: Oklahoma. 



Description. Pygidia are present in the Lower Mercer limestone 

 of Muskingum and Licking counties and also in the Me Arthur lime- 

 stone which have been referred to Phillipsia sangamonensis. No re- 

 mains of the cephalon or thorax have been found. Eighteen segments 

 are present on the mesial lobe and eleven or twelve on the lateral lobes; 



