INDEX 



Acondylacanthua 433 



1 ' seqnicostatus 434 



' ' gracilis 433 



Agassizodns 311 



' ' cormgatus 323 



■ ' scitnlus. 322 



' ' Tflriabilis 318 



' ' Virginianua 321 



Amaeanthua 464 



tribboaus 464 



Anaclitacai tins 412 



semicostatus 443 



Antliodus gracilis 393 



' ' perovalis 393 



Antiquities 30, 146, 224 



Ambonicbia Tllinoiensia 495 



Asapbus vigilana 497 



Aatylospongia prsemorsa. 499 



Asteropty chins bellulas 439 



1 ' Keokuk 436 



' ' St. Ludovici 437 



tennis 438 



" vetustua 435 



Aviculopecten Unionenaia 511 



Axophyllum infnndibulnm 525 



" rudia 525 



Barycrinua striatus 515 



Batacan thus 468 



' ' baculiformis 469 



' ' stellatns 470 



Eathycheilodus 251 



Mclsaacsii 252 



Battery Bock coal 203, 204 



Bond county, geology of 129 



" *' Coal Measures of 131 



' ' Economical geology of 134 



Building stone 20, 29, 35, 48. 60, 73, 87, 96, 103, 109 



[120, 126, 144, 154, 183, 217, 233 



By thiacanthus 444 



"Van Hornei 445 



Calopodus 403 



' ' apicalis 403 



Carbonarca 530 



' ' gibboaa 531 



Oentralia coal shaft, section of 5 



Chsetetes ? carbonaria 526 



PAGE. 



Cholodus 415 



" inasqualis. 416 



Chester group 200 221 



Christian county, geology of 156 



" Coal Measures of 159 



" Quaternary beds in 1.158 



' ' Economical geology of 162 



Chomatodus comptus 356 



inconstaua 360 



incrasaatua 359 



paral lelus 358 



Cladodns alternatus 265 



' ' bellifer 270 



" carioatus 279 



' ' eccentricua 272 



' ' euglypbeus 27 4 



' ' exitf s 258 



' ' exiguua .201 



" Folleri 276 



" gomphoides 269 



" intercostatus 267 



' ' pandatus 278 



' ' prrenuntius 1 270 



" raricoatatus 271 



" Springeri 259 



' ' succinctus 265 



'* Van Hornei 273 



*' "Wachsmuthi 263- 



Clark county, geology of 9 



" " Coal Measures of 10 



" " Economical geology of 19 



Clay county, geology of 88 



" " drift deposits of 89 



" " strati fied rocks of. 89 



" " Economical geology of 95 



Cnemidium Trentonensis 491 



Coal Measures 2 



" " general section of 3 



Conocardium obhquum. 529 



Colea county, geology of 104 



11 " Coal Measures of 105 



" " Economical geology of. 109 



Crawford county, geology of 22 



" " Coal Measures of 23 



" Economical geology of 29 



Ctenacanthua Burlingtonensis 426 



1 ' excavatus .428 



