INDEX. 



PAOE. 



Acondylacanthus 241 



Mudgianus 244 



nuperus 2 12 



rectus 211 



xiphiiis 244 



Acrocrinua 343 



Worthoni . 343 



Agassizocrinus 315 



hemisphericus 3l<> 



papillatus 315 



Agelacrinoidea ; 335 



Alumina 40 



Allagecrinus 341 



Carpenterl 341 



Ancient soils 23 



Anticlinal axis 39, 41 



Arehn:ocidaris 337 



Edgf.rensis 337 



Illinoiensis 338 



spino-clavatus 337 



Areaof Coal Measures in Illinois 1 



Artesian, boring 



" at Canton v 5 



at Marsaillos 50 



" atOlney 5,7,40 



" at Streator ' 40,49 



Asteroidea 327 



Asteroptychius 248 



tenellus 248 



Atkinson, coal in 4 



Aviculopecton 321 



Varso viensis 321 



Batacanthus 253 



necis 253 



Battery Rock coal 3 



Blastoides 34G 



Bloomington, coal in 4 



Boring for coal 



atChapin 32 



Charleston, section of 29 



Danville, section of 23 



Farmer City... . 16 



