INDEX 305 



Mahoning County Continued. Pages 



Sharon ore in i 20 



Upper Mercer member in 11 1-1 12, 149 



Marginifera miiricata var. missouriensis Girty 20, 31, 32, 33, 35,. 36, 51, 52, 53, 55, 



56, 57, 58, 59, 61, 63, 64, 65, 67, 68, 69, 71, 73, 

 76, 77, 78, 80, 82, 83, 84, 87, 98, 103, 105, 106, 



108, 110, 111, 112, 113, 115, 119, 122, 123, 124, 

 128, 132, 133, 135, 136, 137, 140, 184 



Marginifera wabashensis (Norwood and Pratten)___32, 35, 36, 41, 43, 44, 45, 51, 52, 53, 



55, 56, 58, 59, 60, 61, 62, 63, 64, 65, 67, 68, 69, 

 71, 73, 76, 77, 78, 80, 82, 83, 84, 85, 87, 96, 97, 

 98, 99, 101, 102, 103, 104, 105, 106, 107, 108, 



109, 110, 111, 112, 113, 115, 119, 121, 122, 123, 

 124, 128, 132, 133, 135, 136, 137, 140, 184 



Marginifera wabashensis var. Girty 185 



Mark, C. G., reference to 70, 169, 185,235,243 



Mather, K. F., reference to 189 



Maxville limestone 9, 10, 14 



Meek, F. B., reference to 210,211,234,238,243,250,269 



Meek and Worthen, reference to 219,237,258 



Metacoceras cornutum Girty _* 270 



Metacoceras dubium Hyatt 270 



Metacoceras pottsvillensis n. sp. 49, 89, 144, 269 



Metacoceras sp 126, 129, 144,270 



Mississippian-Pennsylvanian unconformity 9, 14 



Muskingum County ^ 



Boggs limestone in 39-44, 146 



Fossils from 31, 32, 33, 34, 40, 41, 42, 43, 44, 57, 58, 59, 60, 



61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 99, 100, 101, 

 102, 103, 104, 105, 106, 107 



Harrison ore in 16-17 



Lowellville limestone in 1 29-34, 146 



Lower Mercer limestone in 56-70, 147 



McArthur limestone in 127 



Upper Mercer member in.__. 99-107, 148, 149 



Myalina cuneiformis Gurley 218 



Myalina kansasensis Shumard . 218 



Myalina pernaformis Cox 40, 42, 43, 45, 55, 70, 71, 87, 103, 106, 115, 119, 



121, 122, 123, 128, 133, 135, 136, 138, 142, 217 



Myalina pernaformis Cox var. 16, 142, 218 



Myalina recurvirostris var. sinuosa n. var 63, 87, 142, 2 19 



Myalina swallovi McChesney 55, 58, 67, 71, 74, 76, 79, 87, 119, 121, 123, 128, 



133, 135, 136, 138, 142, 219 



N 



Naiadites carbonaria Dawson 222 



Naiadites elongata Dawson 19, 20, 24, 25, 26, 27, 28, 37, 45, 142, 220 



Naiadites ohioense n. sp 18,20, 142,221 



Naiadites sp - 22,142,222 



Naticopsis altonensis (McChesney) 40, 46, 56, 72, 84, 88, 143 , 255 



Naticopsisnanus (Meek and Worthen). 64, 68, 70, 80, 88, 112, 115, 122, 125, 126, 129, 



144, 256 

 Naticopsis pukhella n. sp 80,88,144,256 



