BaD ia Nhe wl dha yy Ort id ae Tee eee hs yrs ahha tt Med ann had Pe oar Fae ary Air) u “ vueatauieanes va Se, 4 ya we cae ad Deel be adie ¢ 4ene Te eat an Tied bah Red at Ae ae i) VPPAPUNSAN AD SEO ns ET Maa ¢ aa ica any OOM Ce Me , vr) Aha Ct As ‘ ' rrwve wih. rer ene ee hay oie [ eA Oa Ay AG Oey HS at 40 ‘ fit Raheve reir ROO dy 0) "tala UI} easel “dant mL) wand On) ‘ retiie tiga Ne MS doeaa ie AA ‘ Anis eats owe ba 4 aii CA) Ahy a aN Cue A 4 sila: aera’ Hah ha so Prehtiey Pay eMbe antares VoKg dea jay A , bay 4 “eal ata Wy ay rt Weigheor Se Went t ( HALON ‘ sare t (Fd-4 4 cal ve i Ae eam se ae ' \ Cen EK wade $ whe “ Yas d dite ECE ee a A Wad a acral VAN eek Trebnd ts aides parianaed de aa pik haba ty Hh ied ite al wiaieutee NK ih Ate teint * ows 4) ny ay ed, Ac eat a Wa etre de Hobe Oe be aa ved El Oe ee cee pute A i, a AMAL OE tN ve 4 ae ai * oF 1d habe nice Od CARA OH Cort CAN nha he W 4 ey abe vi at Oey) sie aot eh ie Neha MER Sit CRB ei Ct IT wt vi ent eo UA Ah Qt wie hala bee Mies peat telat i Vina wats M 7 14 ASPs ORAS Mev ’ i W, 5 Ma Ade hl ee} ier a0 ve te alae isi i + 4 ‘ Ai Res Cetin \ ty re fat nN ae LA Lal wih a w Zl 0) th WM rah My ni ny r ‘ie a iva sii nah 2b ony “ 4 se! A ihe 4 aN) a Nitin UCN we aoe 3 nt ae . ' ising fa \ } ray a4 an Cy oi he Du ceurtalitentair iat Wade * "h te ce fe Paes NGL i PANY wi hies ig Het ) Bees = coe hy ay 4 AN at Aa fren Wi 4A And ie 4 ut 0" it Shite saad re 1m fu oo elt PP dus en ease iat 12 f ‘ Wi ie aii Wontar i S) ef Aah: Y “ mots Ber fu asta Wt: mene intial ie inv abe ee rita § hy ot Wfearn tay | Wu iis meh UK WY \ Nee RUE i rtnh Ne on) ot Hea Anas f pie Tea “ ; eh \ ai t? i, , 8) sy te iv oy * mat a Oa \, #0, bi pa. b ie ; a) Bit te ahi i Ce ee tt) ea hain pane Aieet ees iy i, ta Facise # ! ret rahe ay MC GRY »} ‘ f at oH) cy n Dar: Pifice a ARG CaRN, ah i Ry Waheed ’ er ie ty ie . Da “ a i ih x pe ‘ iin a ON ae Pt ROMA aye as a mi ae Se de at fod, vue yar) Wot ri : ya rit Ls et shad Vida ay a ha yt tela ‘ y Wat i sti ane i htt EL et me ao bbemeds its ny rei Mi ih ‘ ie fits a Wes SAS ay es Etat ing z th ee oC) os wrist Vihar de: a Dorr yes on ie) ew “ hata ee ie. oy nC Hb Ree sue wlalics “6 Fs pia Fo Od ee “~ a Be a AS Oy HK Othe ial * + asue va i Bs Lig dy Aae ANG o is way Vike sae He vi ee * i be) tt i ee oe Bt Seaweed an a RAG ei) aay Rt) : Aaah pani! COC ee : ait 1H GL, Yt ies wee Ry bay as ye ie saath De kepe ‘sas Raa / f TERR Mahe OR aa tis aise ee me We Ree: ’ i eat " ae i b if A tale naty Na nce ns ha Pe A, $ bey SANS Rules Ty aun sett 2h an 3 sity ¥ Nei ¥ cobs oR ya. an AEG oh Ay ; A ates adi nes it vein Ste i us ses) RY oa a hy Mey pie UR ‘ ess i 3 a eRe ah ¥ ringing I tei 40) tH, 5 Fi pests rans Pug ex + one tal » cay sy stiy) he Ge Agee Bhs Z Pott ta iy ro ets 4 th cay _Y Mondeo Whe e ath pe he « ee ite ayer iradhr vi mr seipie Shae, ies aku) wes W as PB es ietewaiy Us a Res aie ane he A Meds aA sala ie aii +4 $4 on ris esata Ris ENR, ark at ris ery) wre Ate Ree Crete ; aie ete Berner ae Beas iat », seine eae * nag ee in a reed Tak ws me PY i “f ’ r eA ye wi ‘ ‘ it : ASO : i a i ribo Ay BULLETIN OF THE ILLINOIS STATE LABORATORY NATURAL HISTORY URBANA, Ittrnois, U.S. A. VOLUME VIII 1908-1910 CONTRIBUTIONS TO THE NATURAL HISTORY SURVEY OF ILLINOIS MADE UNDER THE DIRECTION OF STEPHEN A. FORBES 1910 Ittinois PRINTING COMPANY DANVILLE, ILLINOIS 21S76 CONTENTS. - RRDICLE ss PEANKTON “STUDIES. (V. \THE PLANKTON OF THE ILLINOIS RIVER, 1894-1899. PART II.—CONSTITUENT ORGANISMS AND THEIR SEASONAL DISTRIBUTION. BY pace rer OL. ae AT ES). » MVEA BOOB he ee ceca Bes 2-360 LFA TEAR (SI (LETH aR, ON cat RS A, A SE UAE ee a 1=17 Distributionvor Collections by Months (Pabley 2.4. os. 64s a va ee 4 DVR ATS Se Peete Nerd ebro AAA) Ss Ag AMM PPERO ey Mate, bie oho Mkg RE SS 5 Pe Leen) Hae OMT US AM acters, Wisc. site GUI Meee rape oe anie anit sc} ¢ guns eae god ead 7 ee rita irisoh ia Gee weed ain cathe oy pe. noite, send ch aa um) ATR lees dap ioc sheds goods 7 nenwamirpositon Or the Phamlctoti, p.i.% tae er ese dls tees ew ae bod drtje ee the tha 10 Comparison of Fresh-water and Marine Plankton......'............ 12 (DS Rae SAT NSE RTO ge aes Ga eel qo aN ee et eng A Pe 13 Constituent Groups of the Annual Plankton of the Illinois River(Table) 16 Discussion of the Statistical Data of the Species composing the Plankton Sivas Wilineimkaver inl So 4899. 2s keen seh be wil ices ek awa 18-290 ras us een Naas ty ee Oe See NPA ai Lee Sis gee Natta Spa ad a illagd once, sv Smee 13'— 62 Pr ane Ee SiC Coen ye Merce tte A tev Meyer Pater otal ¢ AK das Oho, Sie sont) &, dos wren 4 OE 18 Senn ISse) I COC Rr eit t sc Ane ar ae RR eet ORS EAE oe is oltac tn em are 19 JE SEES S005 20 TON PAS 0) 20s LR ape ee Re ene eee my A cael cn a 20 Pic VIC eae e soe Rus tae OMA Sa GM ore Nw agit MA cis Ae en aM dee ee Passion SPeCles ss. Asa wai sk See nan May fi ete 24 Aes Te EMG Sone ty ay ey Moiese SU aren Satay OO Ae Geet Bec « c Weedeckacn es 34 Rachors.controllings Diatom Production. ..:. 16.01.52. eek. 35 — 43 Diagram showing the seasonal distribution of diatoms, total plankton, nitrates, and thermograph and hydrograph of Ili- nois River at Havana for 1898...:.....2..... Se A SN 37 PP Se MSH OME SD CCLESS tit, tases Par om Fed ace ati et a Ree cans ol OS 748 BGs aptal HUH ya OS pts, cD ed gale ao ecru kegs os ch Ree ic Ate een LE Ace 59 POU Nicide GIMSPE CIES 65 FM Aine Sk octet ge als. wid we wide Boole lb. 0s 60 LP EL aN S42 © Cra aT jay AIR eA a Vad AR 62 SAGE nme AEE AR MUED. 1 CUS ANAS MWR shee tava.d, siegetinrs vie Gok Mleus dere ces 62 NULBUSY SIE(Oy OMS sehen 8 eee take ep ea a ON ee 63 Location and Amplitude of Pulses of Chlorophyll-bearing Organ- istismmoneUilinoissRavers (Mable) sees te oo. y ean lee. 64 PSH seiOMp Ota DECISG Saket SrA mtr d mooie ae fh sae tt a hapa lete. ifs 68 Rhizopoda...... ASE ged ERS Svc eo, TpO Oa NSE OO Ee Oe RENE! ete ee Se 92 | DISTSUISES Foy at Gs 2S O26: Vecae, MEM sm che, Sta lie aay Ueto me ea 95 [SiC INGVA0 ES pees Ae Sane a Waa ol ieee pono We Ae Rel Sieg foes: wis: MISMO OIE PE CIES mths eck th See e et eave k es a UA 113 SECO SMP: ir Nr .. 2 is gue eam he pidh. ha tae eet nee ee 114 a Team rc cnch'sdsl de Sse Paes te egath uo dad er hey Sas «a ate RE bis PAGE SEbUGIC On GI: tate ameter Aun is iad NER arity MER rand Dicegicho ochdus Oras OS gop Discussion: Gf Species se. 2. aii wah sie cia heck ee Cree eee 131 | S/o} Dui 1c: Rena nea RN ere sai Perens cmsiey Can na rasan gS Mla 3 guiee 132 Coelenterata ws. cckc idee he thie ho os erie ud genie ne oe eee 7132 Platyhelminthes..:.: eet mace poke eee ha nae nae he ee ee 133 ‘Warbelllacia. ic Gio Ne sein tenets ae cdetn oe Shei ea ene re ae 133 Treniatod au chscantlac tin a cuentien tie oc ee ye pate eae cusp ea ne SIONS eye me een 134 (GLa) 6) 5 ¢: EN AON RRA end Urea in out eek rier tts Gud oan. MASA) ous 0 la ei-0 pid: 135 IN GATS HE THT pees ttegahs Behan ud oes we Seulctin Sun ee OEE eee RTT ORO es aie fee a 135 Nematelminthes sci i- Msi 2s shee estes eee at ees exe eames ee eee eee 135 Niematodiagy.5 aati cout san sae estene) eo crepe eee oie aac ames ee 135 Acanthoceplaalary iF sfc si.ob caitegerteee feelers NG iene Reape 1 ogc 136 Peak aici (Wot RE na eel teas OO erarRerreds 2 Shoo ii ecrrteig Oh cha aS ad cen a eae Gores 136 Ob tefovelatzcyet: We ec aee nea ie RA WN krish Mihiren wien iets eam 0 % 136 DN ehh: sae teen A aa ME EMS. cers GS ae RYE (oss, Oro ahaa ol Sethe kee 137 7B olOSommatidas (Jo c.ciu. dix Sy Si EO Cnn eee cee ve eee 137 Rio tibetan See rece oe cup sed Aa eee reed eee ER Ct es Cage ete ae 138 IRDAZOCAy, MUL se cdeke sicie: is Sere SR ecw eA penne ore: Stee enone cee ee 1S DiSGUSSIONSOLSPECIES .../)-, dade sive hss > eee A eis See 140 | SVG AL KONG 21S Bi jeed ty in ee a Ree ee Dea Pah chiles Mane eNO MGs Gy Naf src 5 6 141 DiscesstomuaSPCCleS...2. < .assie-ce ots, watt ua Ne ees inn ene ae a 141 | EA LG hina eWay a ae RR oe a eee eee ca RENT R NS Sur olatito lo o's © 144 Pualsesvor Plotma <(Rable)ic fo sc) peta oe sale eet ene 146 Discussion Gl species -% fa c.0 ce aoe ace Recto ence acon a eee 147 Tabular statistical data :— IDI On PAlaNnedon CI UTOHOS 6 G.dasocbdadonosdcdnc0eng5da4a0s5¢ 150153 IRtuSeStObeA nue GW PelaSI1G 7.) earn te eee ee 155 Pulses'of Asplanchnalbreghtwelli. © aa.) 6.24 tele 6 = et ee 156 Evidence of polycyclic character of seasonal distribution of UD ONS Myce oo ee aie oI eae IS MGs Ie Shear) onc) Ca 158 Evidence of same for Asplanchna priodonta........... £4 ees Pialsesnon 27.06/10 114 SuGiUeat! CS errata ieee) ee ee 165 Collection data for Brachionus bakert and varieties............ 169,170 Pulses of Brachionus budapestinensts................+--4+-..116 Pulses of BrachtonusmilttariSame > oe 22 eee 179 Rualsesiob B7achzonws t10llismmr meas che es eee 181 Brachionus pala. Average number per collection............ 182 Pulses of Brachionus pala-and* varieties... .. 0°... 2)... eee 184 Brachionus pala, type torm, ‘sexual cycle... 2. .52 desk 188 Seasonal distribution of B. pala and its var. ampluceros....... 189 Seasonalilimitsiot B82 pola. waredoreasan..... cl... Ree 191 Palseston Brachta ss uyCcolard ster) aoe) 1s) eee 193 Brachionus urceolaris and varieties and 6. variabilis. Average numberywer collection... c../o ace she ero 2 ae ee ee 196 Pulses of Polyarthra platy pteray ts... «+ 2s: eee 204 Pulses*ofSywcheta PRCtinaia oR ed 3 oe eee 211 PUISES OL SyuGh@ta SHYLA... Meri tie > oe: ste ee 213 PAGE Phisestok Uriarinre loneiserd Yxe eo ses es es 218 SEER COU Am es Sens Sener Becta Catcrehs lam ihe, Pius. oe Nise ashe 4 219 Seasonal fluctuations of Pedalion mirum (Table)............... 220 ‘GaginratinGlney, 4 fy Ge Bale ie Be bc (ol Sea A wea, die See eee Reon ee Pe ear 221 TB yan NONaaVOVS UN PANO x ake hes eta COSTES. Siete aca e IGE 5 NS GU Revi eg ear REET 221 Sere ares LIOR A esac I mn Sac cre As aes hate lat Aap a Sum aeeRavey ol es 222 (CilexGheveertans, cchvaen ‘ont Ea lin er Grau io Piao eka SGN oo eae oC Rec 223 Cladocera and Hydrographic Fluctuations (Table)............. 223 ise sc OnE O re SCCICS ire mri owt ah AES ais GN sons Wid la (Si etant foetal» 225 Tabular statistical data:— Bosmina and hydrographic fluctuations...................-. 228 Seasonal distribution of Chydorus. Average number per m.*..235 Effect of temperature on numbers of Chydorus...............238 A typical pulse of Daphnia cucullata. . ate 5 po Diaphanosoma population, with data oa lsinaclete ean river UES recs ee Se oa oe ais OR. oe SOON Aue a cine nee ceeieae cmon. 248 NMociarand hydrorraphic chamg@esss gale. gec p< - eas eae 20 SETAC OG MEE Cotta Saale ae ee de Sharh cst o)c Hc ates etdiewn Sak BS DISCiSSIONM Ole SPECIES. scr etn wnks sine eee Oy oie ais ale at ane nei ene 258 (CxS 1870 SGI I CP Nie tet Po rucaite atari Ah Chae eRe gece On ea pA RE 258 Copepoda and Hydrographic Changes (Table)................. 260 Discrisstom: al SPCCiese. sine teh ees tests ae aa tgs Richey ales 261 Cyclops viridis and Hydrographic Changes (Table)............ QA, 209 Mimnenss ob Cy clopida Clable)ie cache. 2 fle oli a ws ae 278 PRAT IOCLAen ares Oe ake aed Foye rae ana Ae MV sv eltehs ke ich Sass ony eee oe 283 EN TeTC lim Gl Myne epee eny eae rea one mM arte Ror de, eae aanel ce Sue ue enema 283 ENG eae RR en EEE ey yee gs OE es Maa erat ko Mecee-e Aa eeey 0 eee 283 Pergo Treg ere” Ree We Se Rn Never a cierw eee care ae ree ea oP 284 THLESCEre 5:6 ak es Glatt ke Beate ac Sa te ee he a ees ora Cea 284 PEt eft ied eae dn Paras teas age mes ee eos tan see ute Ria 202 2 aa soco henge: 285 elestale [yi Gites ee entre RGR ace Pict Sra ae ar henge + nd 2s ses 285 (DIGOtH SYS See = Serene See ce ee Crete ees Oe SER eng: Sn cae mena nA 285 RV Iie lcs Ca eee Pe ee Fee Meer eng Wenresh cr Aes. oLAFESE foo soci nee seaapevewes 287 TELE PCL ARE ER Meee Ny Reve get ia, aie ae occ am Oe 6 etka Senne eve Se 287 [Lananellinomenmvelirenigne arg Grpettccle Goo, bkevatnerA O's 6 oO cress eres cen 287 BNP -S AOE, A Rye GRC a Aan ty Cn gh ic ae a ac ne A ee a 288 IDE SCURESTGYA OLE AS OVC SS. Ma ce Oe oe a ee ee ee Peer 288 Periodicity in Multiplication of Organisms of Plankton............... 291-311 Comparison of Plankton Pulses and Lunar Cycle (Table)............296-299 (Gaseous! Conmbmentsrotm orca Vice te (lbalole)i 0s ae. ease cred. oe cede etn 306 Relation of Pulses of Chlorophyll-bearing Organisms to Lunar Cycle alba byle)h ee rs anne re aed Ere Panache Sos conn « «23 908 General Considerations on Seasonal Changes.........................912 Pecenyercooneaycre AanitGila.. aca eee ae cota Poe ae oe ee tk pe OLE Organisms per Cubic Meter in Illinois River in 1898 (Table)........... 314-340 Biblosrapitys... 2. - oS 2 A ie I ee Sins it 6 dl ca aed ARS eR OE 341-354 ec eae teri) |. gil ooo ah Rte yeoman viet ete he OOD Vi PAGE Diagrams of Seasonal Distmluttion esha. cee ore ene eer eee ee 356-360 Errata and Addenda.) ci hs echik Sa ance Gc cee eee ein eke ae 361 ARTICLE II. NEW GENERA AND SPECIES OF ILLINOIS THY- SANOPTERA. BY ‘J. DOUGLAS HOOD, AUGUST (22551503: (9) Text. FIGURES): i A.c; -etelas nye Peace aroha eee INERODUCTORY 2 Ses, sive ce oes saree tare Nae eines cate oA Pe cod ssc ag hh a eee 361 Descriptions of Genera and Species: Suborder Terebrantia. Family Thripide. Gens Weterornrips-se: Vee ee ee te a eo te Geeks eee 361 LOTUS CNG eit tk NE OE Eee eo Genus Sericothrips. S.. PULCH CHS Pea Get ae gS EEE CES oe Eee eee 363 Suborder Tubilifera. Family Phleothripide. Genus Zygothrips. ZL AMONEUGC DS oa otter eee EE SMT Ua eT oos ee Cee 364 GentiseL asst pss. os ia Ce eee eee ae eee 365 TE A VAUSCOTAGII katie touscstd tay ss Seats AGC REET POTTS eee SOTA ee 365 Genus Trichothrips. ES UMETAGUNUS go te oe NO OO ee on ee ee 366 TRAM EUSTICODS Sroka Picken doe reg ED Oh Sao lee eee ee ee 367 TE PGW OCHUDUS Pode dt Meike Rh Wiel Rah ork eae Ve oO gee 368 Ds OVATE. Deiat eel eRe Tne PA cas Ro ctiase ee eee. es ere a ole ea 369 GenusiPleciOtint ps, & ont sete spate ee EAR ae ae aes Senne eae 370 PS GNLONMGLWS Wie OS toe ORE eps an te ees ah tees a en 370 GenusSaNCOtRTi psc). oe on ient a. te ear oe ie eee oe ee oil INES GOTLIG US My ie eA Oe Oe ee RE ae ese eS Soe Me aoe a2 Gens Alloiirep Sai coke oaks eet ae arene ak Aa a se nc oe S72 Ae GE saGaPNGlUs.. race wea vents oy nce tentey ates ts ot tee ree 373 Genus Alcaniothraps.. ee yn tows Peles ayant os) nen renee 374 A PQDT GUS: ae totes A ROO ee oe hoe Fee 374 Gents L701 pS 1 isc. as Gites ed eee hens Okie el ee 375 DR GAN (01) eee ede TONS Pen ccs ore nach ud et NR AIRS HE! 3, Succ) SS o1c'S\0.< Si Genus Cryptothrips. CRC OD OME TUS Ee 8 oad ot oh STO EP Oe ee eee 376 Genus Idolothrips. Ee fUGUGBES Soran TR Eo ooh Meas ATT eT ees ee a ee Sh) Systematic List of Specres fs .6.5 cicero) © kere tine ebeee aie ks een ee 379 ARTICLE III. ON THE GENERAL AND INTERIOR DISTRIBU- TION .OF ILLINOIS) FISHES. BY STEPHEN “Ay FORBES: (GlO2MEARS) SSE BBRIMAR VY: WOO9R ere cauerc cere cde be ac, sale eae penne Met arene e nem 381-437 TORO DUC TORY seri seca hechers ws Jeanie Stata ts cinta ean a comets Bvt sates eee ne 381 General OiStilatitiOmsen toate cM te ates era ee eve)» oo tha cece ee ee 383 DRaplevor GeneraleDistribution——p yi 1SmIGUs aan =) perenne 384 Vil PAGE INTERIOR DISTRIBUTION. Table of Interior Distribution—by River Systems. Species and Num- DemROMme OllectOnStOlsey AChie Ameren Rainateh une es ery cha che eis Sie beee 8 pO The lllinois Basin and the other Districts compared.................. 401 Species of the Illinois Basin and Number of Collections of each........402 [itnois Species not found in the Illmois Basin... -.....5..0....54.. 405 Differences between the Smaller Districts and the Illinois Basin...... 406 Lists of Species distinguishing different Districts from the Illinois [By SISTER ¢ | SERBS seth ita Late veiehah Goln SRc ENON SHE Ee MLR NC eto y acon to al thot Re cee eRe ea iene ogee 408 Relanonsroleachs Distrctitorallethnerothersha. = qa. soc o7es seine ee - 408 Number of Species Common to each Pair of Districts, and Ratios to PHEW GmMHer Ol mpecies ah CAChMP Att 6.5 occ HS ke wig nk ale tena lb ele 409 The Fishes of Northern, Central, and Southern Illinois............... A414 Mishessotliumibed Distrib ubioneiny UllimMOiS wares: eeetns soo Jee aoe 412 WiseroleWocaltisy aici skis aati sree: 6 eager Ss Menu eager, sien aie chavat specs alle g 415 Pecularities of Distribution in the Lower [llinoisan Glaciation........ 416 Fishes Rare or Wanting in the Lower Illinoisan Ge eeion bola ee 417 Fishes Tolerant of the Lower Illinoisan Glaciation. eee ERe Acheron M ae at Glacscsiicaponmandawse om colocical sD atan1...2)..4 ace seeds aioe 419 Fishes of the Ohio and of the Mississippi Drainage.....:............- 420 Disibuttonvehiehweine tae! OhjiosDrainagtet =. 442 ie ae ae 421 Distribution chiefly in the Misssissippi Drainage................... 421 jhoundary between Northernvand Southern Species... 0... tee 422 Generalpheatures of ecological Distribution: >.\. oa. 5.....---..+555 65 422 eo loedCaledualn le mpeg wir are aun crane AED en tse ce riya edo sicker d,. pt Pegaveus ee 427 (Gievaueiraill Sygate nen nea ake crore ote Soe ALOE Bec Ole ee OORT OC ee ee ner POR eR ee ec nade 432 IL FISI8 Gil IMIENOSS eke 6 a rhea ode cetera tear San sea me 436 ARTICLE IV. THE ECOLOGY OF THE SKOKIE MARSH AREA, WITH SPECIAL REFERENCE TO THE MOLLUSCA. BY FRANK COLLINS BAKER. (20 Prates; 4 TExT FIGURES, INCLU- DUNC MVEA) eeU ME RIAU Ve HOO) ae bs. porate vy kesee, Soc op) shit eis ecesl Jac ei has 441-499 ICPRGDU COIN ae Shae ts ce Sree ca eae ne eae ee ek are 441 IWilertlaveyal Lt SiRGVG i733 en oho careec oe Aen onan eR ee eran oe RR ec 441 Je leat onALSGNEREOOVESENES are Sadat ate aoc get leren oko Snares pCR pennant ae 442 Heomomncr@OnsiG eratlOUSem nr. cei or 427.2 acute isragen ata vhs Meets eee | 442 (Generalelo poonap li ~ewenyen eae ros hai .s See gee bose thine ayo 3 443 JAS « MUGS. 'SUe3) 6 teh ai gol abe eae geen a ne ee 446 B. The Intermediate Ridge or Sand Spit.. =e PAS milo C. The East Branch of the North Branch a ihe Chicsee er Secs 447 er ihe re lenwmoud Beach) hag ee. Pe. 22 ft naee ew aati ey oats elle 447 Bee bnew Nor nebiranchiom Gre: Gbicaso nvete ser lr. sy-0 (ler eyeners 2156 448 RESO lu Mo MiP ATISONS Sach one weet oa ingen uh tenn MN A te hain aie, 41g SS 449 DetatedsDiscussion/and Comparison Of statiGnhs. . i. in- e es ete ele 0 449 AES Kokien\iarshmotanons lang: [lie artan ass mec ack a ociok ins se aes 449 Baeuevincermediace Ridge: Stationsylll' to XOX. ne 5 452 vill PAGE C. The East Branch of the Chicago River. Stations XXI to XXIX.472 D. Glenwood Beach Ridge. Stations XXX to XXXIV~:.......:.. 479 E. North Branch of the Chicago River. Stations XXXV- and DO .G 18 IE rer Penney er a er eenr enialy anette CRI, ie icaa %,3'G, 9 0 484 SUMITIATY 5 fone Ee gic At ect i Bie oe pire arom cts Seo oicay yoke We nose pC acne ee 484 Table) of TerrestrialSpecies.s.. 2-4 ce cite eee or ae ee ee 487 Mable of luviatiley Speciessnnncrae cc ieee aac nen ene eee 488 di her's: oy 103 00 Aenean oe EE UM rN eaters mei Meret r Matec care Acoien Sim. arene baa" Slo GaN or. 6. < 489 Systematic Cataloswe of the: Mollusca ao..s494 60 aerate ee 491 Biblioonapliy rere eer Pe roe i Rotana aio me een, aera nit ajo <6 497 ARTICLE V. A STUDY OF THE MAMMALS OF CHAMPAIGN COUNTY, ILLINOIS. BY FRANK ELMER WOOD.- (3 PuateEs; al AbaSce INEGI S il IMD), ME IONO..oclaccacdasaedoare ds sesens 501-613 Topography and Mammalian Habitats and Associations....:......... 501 (PDE ice eer at ater aera aren Ante diieten iectle cidt ois ¢ 503 Moraine yRadges. ates no neelet 2 oo 2) eather a nec ieee eee ae 507 Wicod edie lati ses cetese, fate ces ta eects) Ss eo Ieee ve ere cee ee 508 GROVES Ag. SS sora cspoas Bee acs SES eb eos gee Ene oreo aE neta ha 509 Permanent Pastures: cag esc. fo teh Sg ee ted eee ee ee | Koyeys Bol ecb see ee a a ee Eee ante We ania. ae ens 35% 511 IDiScussionhOl SPECIESi can sine oe can escgie 2 Oe ane ey on me aetna ais Potched!Amimials. <.c.0 5 be Bie 22 aysdce Mitac aise ce ica uae ee ene cep ae ae aero 513 Oposstit a cake Cheetos Fae bis sbi oh Sos Ric, SNM cere eags ks een eae ee HootedsAmamals :.. Soe. tut a eoo oad Stace clad tee eh oeaee pee mt oe el ey tice enema Aamerican: Bile. 0, uk yiik c). ils = a sohuae as Maren otc Sere ear en eee ee Vircinian Wihite=tavleds Deen =. <4), nc seas = -cegaee ae ie 516 Bison Ament can B ittalomcemenct a sine say Ra eee sc aRS oe edeie Creare 516 Gnawine Animals: s/c .6 eS. 4 er emt ke eee tere tne oa eae Ox SG UMdEcel aes rahe tack shoe aes ea eerie nel ae: Larrea ees Pela. gily Gray Squienele a5 crocs © cela sett oe See eee ares si, aot alone Page eae 519 Northern Gray “Squirrel. ..c hc) «acto pte ee 5 © 2 eee rela Red ‘Squirrel -©hickaree ye ests eee ae ay hn a eee 521 (Clobi opg oye bau ce medeAtrch aan cen IAMS seRGI iS Gre aeSe ain AB OYA CPOE EGE ELD 0) 0-0 a0 oo 521 Striped Gopher; Thirteen-striped Spermophile...................524 Greeny Coolers loignmidiiaS Syorermmsloyoloull, oo s50ecosenesecscccccnoe 528 \iigorerelel oiwvelico Crcoybtravelelavey, Sonu cleo do ohvenmacene Sho coodco goon Er He 532 IDiishakextslopbbh gs Wem Meese ral ae kimi oq inc © peor SO phaiES oC Glo odo owe 533 13H=4: nic) RNC ee Oe ER re Ree an 2a. Go a ENS ous Qvorordl on. ¢ 536 1 SHI Ye) eet Ore Seen EP a een ee neta PAD IES be” heeat ARE ue ae Gutio.) Praine-vOle.s.0. 22 s4.e.5 25 eee ose an nol Mole Meadow-mouse; Mole-like Vole...........................-556 Miaskeratce Mins cialis een pan ema eee erin so clit cas Gein We ga ODO Coopeqisscenmiunc Coopers cemmine-vole=an ano. eee eo OS REL SOD Meh a wany see atRal me cuanto ose miele SUS oases 0/2 See ag OO Jumping Mouse; Hudson Bay Jumping Mouse...................563 ‘Shae real Ol onins, Shygebaay =| Ne WRe ne ad Ob aeneemnay ornveleaeded did ici ioia nee eechencuoucle, Fe 564 Canmmnonpira Ooi COGcoOmbarleme en: yr eimaeie are ten testy cicueeee aise wd cl oes 564 Amaemonm IReiplomen Wermmauner Islands \iVldwitS INA OloME, G o50u gue or oe coe Oe ISSO Seiinuaer wa sanbAalell Serees pimslekeleees pik eeiaehcnoee ae io: dec cea che cleeig Cie crlon: 569 arab hiete seater ware tat ved eae habe aut eh CORDON celta Bate 569 ina Ga le him Me stan et wae nee eee ae eee Neate ite aid epee we oe VOD. WGN Wats ae 0c a eva Metra ee ne aes ee Aire ae, Sea Os nee em Ea ae 569 “Pitiatan] Sie OTE tos Micke erauey Rake By ol ucie neta) oe ea Alcs cereus chi cenl ECE Or eae ear 570 RAtGie=wOll mG OVOLCe ser Cmte cea, | ot eer te eye aleeite «era, oe ei gions SOKA NGI Ox geepinrs iter. sc cr ccegehie ey Ra ee MONA se ye we A A gael (CHEER LENG < Sn Choe hae ne ed er ee Ace Ce Ma ec oie 572 Baka) Garten tacit a eee ears eae ae Rn oa, cS he OA eas Ss eon RACCOOM EM GOO. Sarecc ete 2 See a LoTR O IES Witte ale ae OO ACSI Pep reste es Hoge eee Mtoe aR EEE aN A RM ed es ae cree POINE A\anseieain: IMienetiems Valovelsyorn IBiahy SENSES . 4 oo ucoanubausovcsdsooouGOld ESL e ieee seen nest a creee, Scena Ree ee et PERO, Ceara Ys c6ts, srk a Fateh NaS Cleese sy See ware c is is ee tree PRN eo eRe yh Fee ees oe OIS (QOHIGIE, is. Garter cre elas Re ch rer os 1G. chr RS eR oe | er gre a eer ABACK SRA? Av apiOMEN SIs is APS cat d yas ClglhGes. CMGI O eo, came nee IGECEG Oreo n Oo) ol Coopems oinew: 4 wong-talled slrew nae aaa oe oe rae re SOO Bachmnmanesm slice Wis sega y Meeker che sree hot ee ec as ite ated me ele Oe SOneevatledeshmewienct. a. yeas SF et roe Clea eo Se won cin DOO Carolinas New aeepenior ok hc Sec moteety ss en) 5 oA ol a es coe EMO a aoe a end area a DION Sila rR Mie WaeeE rere see aye oe EO. Araceae cit pa OS GATOS Ci MIOl Chen cn pate te tend nt een “eet nee 2 MG ae een DOO Wonnmoneole-ohnew-m Ole. festa 0 fos vee ne ede cede che 589 JBNBUES 6 san. a SIRREME Dek Sat ake PORE Geet Wis a eaten ot eick ual en cre care Mar a aREe ah aeieaeme Soe SEIN? SS: LBB te 3 con doer ey REND eo var SEER: ot cee ee noc 593 Briicata ComUMAe CU i Ey tate ae te Pre h ra ME COINS need Se ee ee eee DISCUSSIOMLOL SPECIES .iag.ye aye xin. o0a cia bashes Melia ca Ae ee Ploinan aes Pulses*of Plotmai(Claible) lant scrccc ye samcaiche: sci cects aie eee tete Chor eee Menon DiscussionvOl Speciesyy. 154.3 cc4 octs ee aiais eO etneL ree eae Tabular statistical data :— Pulses of Pulses of Pulses of AUTRE CIGOCHICATAS S nete @ a en ee eee AMUTED WYDELESIVA ihe. ooo ee et ee oe US PIGNGH NOON Ct Well dt wee ee el eee Evidence of polycyclic character of seasonal distribution of above. Evidence of same for Asplanchna priodonta.................-. ID wIISSS Ol ISG PHOOIS HMROWOTISs oa nob conse oe dcddesagaoao bons Collection data for Brachionus bakert and varieties............ Pulses of Brachionus budapestinensts............. Pulses'of Brachtonus meletarts 2... sic. soe ee oe ee ee PulsestomBraGnsowUsminOllaSamant Seer ain eee eke eee eee Brachionus pala and varieties. Average number per collection. Pulses:of Brachzouns pala-and Varieties...) 92505 4440-1 ee Brachionns pala, type torm. + Sexualicycle. oe.) eee Seasonal distribution of B. pala and its var. amphiceros......... Seasonal Mimatsrote Seep alan wate Gd ONGC Seite arene te eee eee IP ulSesvOneSnaGhtonws) U1GCOLOTCS erie eee Brachionus urceolaris and varieties and B. variabilis. Average rab buaal|oYere ose COMME MA A kno occ eauconobUbeesooneouasouet Pulsesiot Polparthraplarypierd.. an ace ae 0 eet = okie Palses of SyucHeia Pectinara:mceats fo sve eed eee IPulsesion Synch @iarsiy lata zen je eee eer ae eee Pulsesiofadinganthralong7scta a.) aie eee eee Seirbopodare yar. jtscce ays Seve oops oom coal ee Seta ne elas glist oes) ocean Seasonal fluctuations of Pedalion mirum (Table)................. Gastrotricha... Vil PAGE PUPUQMAOSITACH oes ENA ciel cs Nee ane ad oe Pedal b a gee EP dk ety wale es Zan Hove cueeie AO OGRE ee nee tetas GRC ola fasecrahe feats Sa. Ales ate aks Oe VRS ae We aes 222 MSO Sale Mee AA Pe aks a Atiieh a i Shae a aS el Sled vw eo 223 Cladocera and Hydrographic Fluctuations (Table).............. 223 iE ASCE SNIOIA. OF SOG CIES Beene CaO te oar a ee eae 225 Tabular statistical data :— Bosmiuma and hydrographic fluctuations: ..:....00....60....05% 228 Seasonal distribution of Chydorus. Average number per m.°... 235 Bitect of temperature On numbers of Chydorus......6..08..0-- 238 A typical pulse of Daphnia cucullata.. Ry : Erte 242 Diaphanosoma population, with data Bf: fete ra fare and river WENO esc. 5 Bos ck DAS occa Recetas 248 Miornorand hydrooma pic CHANGES: 4.55055