370 INDEX. 



PAGE. 



Murphysboro, coal in 4 



Nashville, shaft, section of v 10 



Neeleyville, coal in 33 



Oglesby, shaft in, section of 48 



Oil wells 38 



Okawville, shaft in 11 



Olney, coal at 5,7 



Onychccrinus 307 



distensus 307 



Ophiuroidea 330 



Oracanthus 255 



rectus 257 



' ' vetustus 255 



Orthoceras 323 



" Illinoienses 323 



LaSallensis 324 



Okawensis 324 



Orthopleurodus 190 



carbonarius 192 



" convexus 193 



' ' Nova Mexicanus 195 



Outcrop of coal 42 



PalsoasteridsB 327 



Palaeocrinoidea 270 



Palaeontology of Illinois 344 



Pana, boring at 24 



Patterson's shaft 42 



Peddicord's well 50 



Peoria county, coal mines in 6 



Pentremites 357 



" subtruncatus _ 357 



Pentremitidea 363 



' Americana 363 



clavata 364 



Perischoochinidse 331 



Perischodomus 333 



Illinoiensis :5Si 



Perry county, boring in 38 



Phoenoschisma 356 



Verneuilli 35C 



Physonemus 252 



falcatus 252 



Pinna 326 



" St. Ludovici 326 



Platycrinus 306 



" Monroensis 306 



Plcurotomaria 324 



" Montezuma 324 



Pnigeacauthus 259 



trigonalis 259 



