———EIE 
Soh 
TABLE I—continued. 
ORGANISMS PER CuBIcC METER IN PLANKTON OF ILLINOIS RIVER IN 1898. 
(An asterisk at head of column indicates that all entries in it are based on 
filter-paper collections.) 







4 8 
5 E ee es 
Sey = 3 gs 
1898 2 gs g8 zs 88 38 SES < 
38 RS 3 S8 ss ss 2s 8 = 
x m ie) S) Q Q Q = 
Jane iden... 0 0 0 100 0 0 0 0 
COED (ates 240 ) 0 200 a) a) 0 0 
Ch a a 154 308 0 0 0 0 0 0 
Bebi waiencet 0 24 0 0 0 0 0 0 
a NS eee 0 0 0 0 0 0 0 0 
COT eee 0 0 0 0 0 0 0 0 
CS OO ee 0 0 0 0 0 0 0 0 
Mar: da. .ce- 0 80 0 80 0 0 0 0 
Cr) A rane 0 40 0 40 0 0 0 0 
Ree 15 econ 0 120 0 440 0 0 0 0 
Cs DN ve 0 280 0 480 0 0 0 0 
Bo DYS)  ae 0 20 20 240 20 0 0 0 
Wor Sistas. 20 100 40 200 0 0 0 0 
CIs) wee Tea 20 60 20 200 20 0 0 0 
SEV G arava 200 100 0 0 0 ) 0 0 
LS GY a oer 0 800 | 320 300 0 0) ) 0 
Maio 3h. c20c 0 2,800 0 0 0 0) 0 0 
Giles noge 0 3,600 400 600} 600 0 0 0 
COT era ies 200 3,500 400 3,300} 300 0 0 0 
CaF iis alee 480 5/920 2,960 7.880] 440 160 0 0 
Seanad Rk. ob 40 33,920 8,720 5,040 1,000 720 40 0 
NaineletiA Ska 200 62,800 55,800 600 | 3,400 11,600 0 0 
Ci Sie ee 0 6,000 10,600 200 | 2/400 9,200 0 0 
OO ie ee 100 1,500 400 0 100 0 0 200 
LO oe 200 700 | 0 0 0 0 0 100 
inciky “Sneoaes 0 200 0 40 0 0) 0 400 
TPP Manes 0 180 0 0 0 om 60 120 
bal NiO ea tae 0 0 | 160 0 0 40 1,040 
CIED.G ts Oe ee 0 180 120 0 0 0} 8,580 1,080 
IN Soa 0 40 0 0 0 0} 6,960 3,520 
cam O pe 7. 0 0 0 0 0 0) 360 360 
COM EG Ie hes 0 0 0 0 0 0 60 1,260 
Win Dich ene 0 0 0 0 0 0} 1,020 900 
HS Oise ak 0 0 40 0) 0 0| 2,520 1,440 
Septh iOlns 0%: 0 0 40 0 0 0) 240 440 
poe: free... 0 0 0 60 ) 0} 1,800 1,560 
ee Oke oe 0 60 0. 60 0 oO. 960 480 
ay Ce 0 0 100 | 0 0 0 400 500 
Oct. 42 p05 5. 0 0 | 0. 40| 400 0) 880 120 
Ce IRL ae 0 920 | 0. 0| 600 0 400 40 
Ci eae 0 1,360 | om 80 80 0 560 0 
OO NGS Oey ie 0 840 Oo. 120 60 0 0 0 
Wow, lsscese 0 60 | on 60 0 0 0 0 
CRG h eA. 0 0 | 0 | 0 0 0 0 0 
OF TS eek 0. 100 | 0 0 0 0 0 0 
Le ie ee 0 0 0 0) 0 0 ) 0 
Ch GX) 5 Tenis 0 0 0 80 | 0 0 0 0 
Mec. Ge .. 0 40 | 20 | 200 0 0 0 0 
NTS eae 0 140 | 40 | 220 0 0 0 0 
SER ON Be oP: 0 120 0 | 160 0 ) 0 0 
Cy br ee ee 0 0 | 0 280 a) 0 0 0 
Asam San 36 2,441 | 1,539 | 422| 181 417 479 261 







