Index. 



311 



Oreodon gracilis, 84 

 major, 84 



(Merycoidodon), 86, 87 

 superbus, 87 

 Oreodontidae, 30 

 Orinoco River, no 

 Ortmann, A. E., 159 

 Osborn, H. F., 22, 60, 265 

 Osteology of the Mosasauridse, An 

 Undetermined Element in, 162- 

 167 

 Osteopygis gibbi, 12 

 Otocinclus, Key to species of, 121 

 Otocinclus vittatus, 121, 149 

 Ovis canadensis, 6 

 Oxydactylus, 22 

 brachyceps, 56 



longipes, 288, 289, 293, 295, 297, 

 298 

 Oxydiscus acutus, 197 



catilloides, 197, 219 

 Oxydoras eigenmanni, 116, 148 



kneri, 148 

 Oxyropsis inexpectatum, 149 

 Pachyurus bonariensis, 144, 155 



schomburgkii, 155 

 Page, E. H. L., 82, 228 

 Palaeacmaea irregularis, 174, 175, 219 

 Palaeomeryx ? borealis, 98 

 Palaeotherium bairdi, 270 

 Paleontology of Minnesota, 211 

 Paleozoic Fossils of Canada, 169 

 Panderia conradi, 245 

 Parahippus, 35, 46 



nebrascensis, 56, 57 

 texanus, 57 

 Pariotichidae, 2^7 

 Parodon gestri, 151 



paraguayensis, 124, 151 

 suborbitalis, 151 

 tortuosus, 151 

 Patellidae, 171 



Pawnee Creek Loup Fork, 98 

 Peltosaurus granulosus, 284, 285 

 Pelycosauria, 22,7, 240 

 Petersius, 127 

 Peterson, Mrs. Eda, 19 

 Peterson, O. A., 82, 85, 95, 96, 159, 

 228, 229, 283 

 Description of the Type Speci- 

 men of Stenomylus Gracilis 

 Peterson, 286-299 

 Miocene Beds of Western Ne- 

 braska and Eastern Wyoming 

 and Their Vertebrate Faunae, 

 21-72 

 Petrified Wood, 91 



Phenacocoelus, 37 



typus, 29-32, 38, 40, 41 

 Phillipsburgh, Canada, 169, 217 

 Phillips, John M., 6 

 Phylloporina, 197 

 Piaractus brachypomus, 154 

 Pimelodella buckleyi, 114 



eigenmanni, 114 



gracilis, 114, 148 



lateristriga, 114, 148 



mucosa, 114, 148 



taeniophorus, 148 

 Pimelodinae, 148 

 Pimelodus albicans, 148 



clarias, 115, 148 



fur, 115, 148 



ornata, 115, 148 



valenciennis, 115, 148 

 Pinarampus pirinampu, 148 

 Pitcairn, Pennsylvania, 234 

 Pittsburgh Red Shale, 234 

 Plagioscion ternetzi, 155 

 Planorbis, 91 

 Plastron of the Protosteginae, G. R. 



Wieland, 8-14 

 Platecarpus, 163 



Plates, Explanation of, 14, 156-157, 

 221-225, 240, 254-255, 276-277. 

 Platygonus, 231 

 Platypoda, 210 



Platyostoma auriforme, 217, 218, 220 

 Plecostominae, 149 

 Plecostomus borelli, 149 



boulengeri, 122 



commersoni, 122, 149 



Johni, 122, 149 



plecostomus, 122, 149 



robini, 149 



ternetzi, 122 



vaillanti, 149 



vermicularis, 122 



wuchereri, 149 

 Pleistocene Fauna, A Preliminary Ac- 

 count of, Discovered in a Cave 

 Opened at Frankstown, Penn- 

 sylvania, in April and May, 

 1907, 228-233 

 Plethospira hyale, 219, 220 

 Pleuronectidae, 156 

 Pleurotomaria amphy trite, 216, 220 



antiquata, 168 



biangulata, 168, 206, 220 



calyx, 169, 177, 178, 180, 220 



crevieri, 169, 177, 178, 180, 220 



docens, 169, 176, 179, 220 



immatura, 169, 177, 182, 220 



pauper, 169, 177, 178, 180, 220 

 Pleurotomariidae, 186 



