CONTENTS. 
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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 
