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 cucid- 



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, 



41 

 Eskers, 68 



Feldspar, 72 

 Ferns : 



— Adiantiim pedatiim, maidenhair fern, 



210, 213 

 — Aspidium: 



cristatum, 199, 200, 247 



marginale, margined fern, 210, 213 



novaboracense, pale wood fern, 210, 



213 



spinulosum, florist's fern, 210, 213 

 Thelypteris, marsh fern, 195, 198 

 — Asplenlmn: 



acrostichoides, wood spleen wort, 



210, 213 

 angusti folium , spleenwort, 100 

 Filix-femina, lady fern, 210, 213 

 — Coniptosorus rhizophyllus, walking 



fern, 266, 269 

 — Cystopteris: 



bulbifera, bladder fern, 264, 265 

 fragilis, fragile fern, 100, 264 

 — Onoclea: 



sensihilis, sensitive fern, 179, 180, 



221 

 strut hiopteris, 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 atro purpurea, purple-stemmed 



clifif brake, 265 

 — Phegopteris polypodioides, beech fern, 



210, 213 

 — Polopodium vidgare, rock polypody, 



268, 269 

 — Polystichknn acrostichoides, Christmas 



fern, 210, 213 

 — Pteris aquilina, bracken fern, 211, 



214, 221 



Fish: 



— Bass: 



black, large-mouthed, Micropterus 



salmoides 

 black, small-mouthed, M. dolomieu 

 rock, AmhlopUtes rupestris 



— Bluegill, Lepomis pallidus 



— Bullhead: 



black, Ameiurus melas 

 spotted, A. nehulosus 



—Cat: 



mud, Leptops olivaris 

 stone, Notorus flavus 

 tadpole, Schilheodes gyrinus 



— Chub, river, Hybopsis kentuckiensis 



— Crappie, black, Pomoxis sparoides 



— Dace: 



black-nosed, Rhinichthys atronasiis 

 horned, Semotilus atromacidatus 

 red-bellied, Chrosomiis erythro- 

 gaster 



— Darter: 



banded, Etheostoma zonale 

 black-sided, Hadropteriis aspro 

 fantail, Etheostoma jiabellare 

 Johnny, Boleosoma nigrum 

 rainbow, Etheostoma coendeum 

 sharp-headed, Iladroptcrus phoxo- 

 ccphalus 



— Dogfish, Amia calva 



— Miller's thumb, Cottus ictalops 



— Minnow: 



blunt-nosed, Pimephales notatus 



Cayuga, Notropis cayuga 



mud, Umbri liml 



red-faced, Notropis riibrifrons 



red fin, N . lutrensis 



straw-colored, N. blennius 



sucker-mouthed, Phenacobius mira- 



bilis 

 top, Fiindidus dispar 



— Perch, }'cllow, Perca Jiavescens 



—Pike: 



Esox liicins 



grass or small pickerel, E. vermicu- 

 latus 



