INDEX 



315 



Dolomite, 72 



Dragon flies, distribution of, in streams, 



280 



Dragon fly, see Odonata 

 Dragon, green, Arisaema dracontium 

 Dunes, 13, 112, 123, 150; formation of, 



13, 112, 114, 116, 122; plants of, 



tabulation, 144-47; rate of advance 



of, 13 



DuPage River, 67 

 Dutchman's breeches, Dicentra cucul- 



laria 

 Dyke, 39, 40 



Earth: crust of, 17, 29; heat of, 25; 



origin of, 22, 25 

 Earth worm, 165 

 Erosion: agents of, 2, 27; amount of, 



4i 

 Eskers, 68 



Feldspar, 72 



Ferns: 



Adiantum pedatum, maidenhair fern, 



210, 213 

 Aspidium: 



cristatum, 199, 200, 247 

 marginale, margined fern, 210, 213 

 novdboracense, pale wood fern, 210, 



213 



spinulosum, florist's fern, 210, 213 

 Thelypteris, marsh fern, 195, 198 

 Asplenium: 



acrostichoides, wood spleenwort, 



210, 213 



angustifolium, spleenwort, 100 

 Filix-femina, lady fern, 210, 213 

 Comptosorus rhizophyllus, walking 



fern, 266, 269 

 Cystopteris: 



bulbifera, bladder fern, 264, 265 

 fragilis, fragile fern, 100, 264 

 Onoclea: 



sensibilis, sensitive fern, 179, 180, 



221 



struthiopteris, ostrich fern, 210, 213 

 Osmunda: 



Claytoniana, Clayton's fern, in- 

 terrupted fern, 180, 181, 182, 221, 

 270 

 cinnamomea, cinnamon fern, 180, 



182, 182, 200, 221, 270 

 regalis, royal fern, 180, 181, 182, 

 200 



Pellaea atropurpurea, purple-stemmed 



cliff brake, 265 

 Phegopteris polypodioides, beech fern, 



210, 213 

 Polopodium mlgare, rock polypody, 



268, 269 

 Polystichium acrostichoides, Christmas 



fern, 210, 213 

 Pteris aqmlina, bracken fern, 211, 



214, 221 



Fish: 



Bass: 



black, large-mouthed, Micropterus 



salmoides 



black, small T mouthed, M . dolomieu 

 rock, Ambloplites rupestris 



Bluegill, Lepomis pallidus 



Bullhead: 



black, Ameiurus melas 

 spotted, A. nebulosus 



Cat: 



mud, Leptops oliiiaris 

 stone, Notorus flavus 

 tadpole, Schilbeodes gyrinus 



Chub, river, Hybopsis kentuckiensis 



Crappie, black, Pomoxis sparoides 



Dace: 



black-nosed, Rhinichthys atronasus 

 horned, Semotilus atromaculatus 

 red-bellied, Chrosomus erythro- 

 gaster 



Darter: 



banded, Etheostoma zonale 

 black-sided, Hadropterus aspro 

 fantail, Etheostoma flabellare 

 Johnny, Boleosoma nigrum 

 rainbow, Etheostoma coeruleum 

 sharp-headed, Hadropterus phoxo- 

 cephalus- 



Dogfish, Amia caha 



Miller's thumb, Coitus ictalops 



Minnow: 



blunt-nosed, Pimephales notatus 

 Cayuga, Notropis^ cayuga 

 mud, Umbri limi 

 red-faced, Notropis rubrifrons 

 red fin, N. lutrensis 

 straw-colored, N. blennius 

 sucker-mouthed, Phenacobius mira- 



bilis 

 top, Fundulus dispar 



Perch, yellow, Perca flavescens 



Pike: 



Esox lucius 



grass or small pickerel, E. vermicu- 

 latus 



