294 



PLATE XV 



Page 



Figs. 1 to 3. Euphemus nodocarinatus (Hall) 249 



Figs. 1, 2. Views of two specimens. Upper Pottsville 



(McArthur)?: Hocking County, Carbon Hill. 

 Fig. 3. Lower Mercer member: Perry County, Somerset, 

 Locality 35. Hyde collection 822. 



Figs. 4, 5. Euphemus carbonarius (Cox) 249 



Lower Mercer member: Licking County, Flint Ridge, 



Locality 47. 



Fig. 4. Specimen of average size. 

 Fig. 5. Same. x2 



Fig. 6 . Pharkidonolus percarinatus (Conrad) 248 



Lower Mercer limestone: Licking County, Flint Ridge, 

 Locality 47. 



Figs. 7 to 13. Pleurotomaria ornatiformis n. sp 253 



Harrison ore: Jackson County, Hamilton Township, 



Locality 1. 

 "Squeezes" made from external molds of several cotypes. 



Fig. 14 . Pleurotomaria carbonaria Norwood and Pratten 2 52 



Lower Mercer limestone: Licking County, Flint Ridge, 

 Locality 47. 



Fig. 15. Naticopsis altonensis (McChesney ) 255 



Boggs member: Muskingum County, near Hopewell P. O., 

 Locality 26. 



Fig. 16. Naticopsis pulchellan. sp : 256 



Lower Mercer member: Stark County, near East Green- 

 ville, Locality 52. The'holotype. 



Figs. 17, 18. Naticopsis tortum (Meek) 257 



McArthur member: Vinton County, Elk Township, 

 Moore mine, Locality 84. 

 Two views of the same specimen. 



Figs. 19, 20. Schizostoma catilloides (Conrad) 255 



McArthur member: Vinton County, Elk Township, 



Moore mine, Locality 84. 

 Opposite views of two specimens. 



Fig. 21. Sphaerodoma klipparti (Meek) 262 



Lower Mercer member: Perry County, Somerset, Locality 

 35. Hyde collection 821. 



Figs. 22 to 24. Sphaerodoma brevis (White) - 261 



Fig. 22. McArthur member: Vinton County, Elk Town- 

 ship, Moore mine, Locality 84. 

 Fig. 23. Stark County, near East Greenville, Locality 



52. x2 

 Fig. 24. Same, natural size. 



Fig. 25. Hemizyga n. sp 260 



Lower Mercer limestone: Licking County, Bald Knob, 

 Locality 46. 



