IV 



INDEX. 



PAGE. 



Spirifer fastigatus 521 



' ' neglectus 523 



1 ' sub orbicularis 523 



Stemnifttodus 328 



1 ' cheiriformis 330 



1 ' compactus 334 



' ' bit urcatus 330 



" bicristatus 331 



Keokuk 334 



' ' simplex 332 



' l syrnmetricus 333 



Stricklandinia deformis 502 



Subnlitesiuflatus 495 



Synbathocrinus robostus 514 



Tanaodua 367 



' ' bellicinctos 376 



1 ' depressus 378 



' ' grossiplicatus 375 



' ' praenuntius .* 37 1 



' ' polymorph.ua 360 



' ' pumilus 369 



' ' sculptus 373 



' ' anblunatus 368 



Thrinacodus 289 



' ' nanus 289 



Upper Coal Measure section 128 



Vandalia coal shaft, section of 146 



Venustodus 344 



1 ' argutus 352 



" Leidyi 350 



' ' robustus 345 



1 ' tenuieristatus 348 



" variabilis 346 



"Wabash county, geology of 51 



' ' _ Coal Measures of 52 



'' trees and shrubs in 63 



"Wayne county, geology of 82 



" ' ' Coal Measures of 83 



" ' ' Economical geology of 87 



"White county, geology of 66 



" " Coal Measures of .... 67 



" " Economical geology of 73 



"Williamson county, geology of 112 



' ' " Coal Measures of 113 



' * Economical geology of 120 



Xy stracanthus 457 



' ' acinaciformia 459 



' ' mirabilis 458 



