INDEX. 
Ill 
7 
My 
PAGE. 
Kankakee and Iroquois counties, Coal Mea¬ 
sures in....231 
Kankakee and Iroquois counties, Niagara 
limestone in.232 
Kankakee and Iroquois counties, Cincinna¬ 
ti group in. 233 
Kankakee and Iroquois counties, economi¬ 
cal geology of ..234 
Kankakee and Iroquois counties, ancient 
valley in.237 
Kendall county, geology of.136 
Kendall county, Coal Measures in.138 
Kendall county, Niagara group in.139 
Kendall county, Trenton limestone in... .143 
Kendall county, St. Peters sandstone in.. .146 
Kendall county, economical geology of... 147 
Knorria ..445 
Knox county, geology of.313 
Knox county, Coal Measures in.314 
Knox county, economical geology of.322 
Lepidodendron.428 
Lepidodendron cruciatum.432 
wLepidodendron elegans.433 
Lepidodendron forulatum.431 
Lepidodendron gracile.433 
Lepidodendron Greenii...433 
Lepidodendron modulatum.430 
Lepidodendron Morrisianum. . .430 
Lepidodendron mammillatum.482 
Lepidodendron rigens.. ..... 429 
Lepidodendron Tijoui.431 
Lepidophloios auriculatum.439 
Lepidopliloios laricinum...440 
Lepidophloios protuberans.440 
Lepidostrobus.440 
Lepidostrobus connivens.442 
Lepidostrobus lancifolius.442 
Lepidostrobus oblongifolius...441 
Lepidostrobus ornatus...443 
Lepidostrobus ovatifolius.441 
Lepidostrobus truneatus.442 
Lepidophyilum foliaceum.444 
Lepidophyllum rostellatum.443 
Lepidophyilum striatum. 443 
Listracanthus.371 
Listracanthus hystrix...372 
Lophodus.360 
Lophodus variabilis.361 
Lycopodites annularisefolius .426 
Lycopodites Meekii.426 
PAGE. 
McHenry and Lake counties, geology of. .126 
McHenry and Lake counties, Drift depo¬ 
sits in.129 
McHenry and Lake counties, Niagara 
group in.131 
McHenry and Lake counties, Cincinnati 
group in.132 
McHenry and Lake counties, economical 
geology of.133 
Mercer county, geology of. 301 
Mercer count)’, Loess and Drift in.302 
Mercer county, Coal Measures in.302 
Mercer county, Kinderhook group in.307 
Mercer county, economical geology of.... 307 
Mercer county, soil and agriculture of... .311 
Morgan county, geology of.149 
Morgan county, Coal Measures in.151 
Morgan county, St. Louis limestone in.. .160 
Morgan county, economical geology of... .161 
Neuropteris .380 
Neuropteris angustifolia.467 
Neuropteris capitata.383 
Neuropteris Collinsi .382 
Neuropteris coriacea.387 
Neuropteris crenulata.468 
Neuropteris fimbriata.384 
Neuropteris fasciculata. 381 
Neuropteris hirsuta.380 
Neuropteris inflata.387 
Neuropteris microphylla.467 
Neuropteris rarinervis .386 
Neuropteris verbenaefolia.385 
Neuropteris vermicularis.385 
,Yi>v ^■ s&'y . 
Odontopteris Bradleyi. 390 
Odontopteris Schlotlieimii.391 
Odontopteris subcuneata,.390 
Orodus corrugatus. 358 
Pachypteris.419 
Pachypteris gracillima. .419 
Palasoniscus gracilis...347^p p / - <: / 
• ° <>M‘OA>r? . 
Palmoxyris.464 / 
Palasoxyris appendiculata.465 
Palasoxyris corrugata.466 
Palasoxyris Prendeli..464 
Peat, deposits of. — ..124, 134,148 
Pecopteris abbreviata.403 
Peeopteris arguta.402 ■ 
Pecopteris aspidioides.403 
Pecopteris Bueklandi..401 
