os 
TABLE I—continued. 
ORGANISMS PER CuBIC 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.) 
* 
% 2 
SS = s 5 N fs 
NS een s§ 33 3% e§ =§ 
1898 Ba Ss as § & S38 eS = 
SR QS sf wes &5 a3 aS 
ES £sS ss Ss S38 2 SE 
Sees 5§ Cee aa 
Mans) Udo, con 0 0 0) 0 0 0 0 
ee AOE ak 0 0 0 3,000,000 0 100 0 
Ve MDD hates tate 0 (0) 0 0 0 (0) 387 
Hebe) Sis. slek 0 0 0 0 0 10) 300 
wm (oieOue RCS 0 (0) 0 (0) 0 (0) 0) 
See Drs .a kee 0 (6) 0 0 (0) 0 400 
Sh Sete ete 0 0 (0) (0) (0) 0 0 
Many dence: 0 0 0 0 10) 10) 400 
Ps Bisset (0) 0 0 0 0 (0) 0 
pee Onsie sre (0) (0) 10) (0) 0 600 1,800 
See OD velar 7c 0 (0) 0 (0) 0 0 800 
Ao Reena 0 0 Cc 10) 0 600 200 
JN Oy ie ee oreo 0 100 0 0 0 0 200 
pee rer tas 2 0 100 0) 0 0 0 0) 
Ce lols Reve es 0) 0 0 0 0 400 400 
oo) Osean 10) 0 0 0|}1,800,000 3,200 1,600 
Marie Se c..25 0| 3,200 0 0|7,200,000} 3,200 0 
pee ye © (0) 0 0 57,600,000 | 7,200,000 6,400 4,800 
S022 Gia ata 1,800,000 0 0 0 0| 4,800 5/600 
Se A eek =| 0) 0 0 (0) 10) 600 1,600 
mM SUI cet eer ce 0) 0 0 5,400,000 (0) 1,000 600 
[ia W/coer cree 0 (0) 0 0 0 3,200 12,800 
Se Ee ee 0) 0) 1,800,000 0 0} 32,000 39,400 
peal sna 10) 0 0 10) 10) 800 56,000 
SUG emennes nes 0 0) 3,600,000 (0) 0 6,400 55,200 
alwys eS its Sic 0 0 0 10) 0 3,600 44,800 
Lf BUPA ear 1,800,000 0 0 0 0 1,200 49 ,200 
pa Ore 10,800,000 0 10) 61,200,000 0 4,000 136,000 
END Gos et 5 ;400;000 0 9,000,000 1;800,000|1,800,000| 4,000| 247,600 
Mare 264 Se. 3,600,000 0 0 9,000,000 0| 4,800] 295,200 
PRIOR cat 5 }400;000 0} 10,800,000] 1581400000 0| 2,800] 145,600 
eae 5 400/000 0 3,600,000] 18/000;000 0] 1,600 66,400 
eS cos Pate 10,800,000 0 900 ,000 14,400,000 0 5,600 194,400 
ee eo OFF re Ayeiece 21,600,000 (0) 1,800,000 21,600,000 | 7,200,000 8,000 326,400 
Sept: 6...... 10,800,000 0 ) 0 0| 12,000] 177,600 
Bis Gel Bier os <7 7°200;000 0 1,800,000 7,200,000 0 500 42000 
COS YO) Santee 7,200,000 0 0 0 0} 8,500 76,000 
S oi tee 0 0 0 1,800,000/1,800,000) 65600} 259,200 
GYs nc ae ae 1,800,000 0 0 0 0} 5,500 18,500 
Sige i ha eee ge 1,800,000 500 0 3,600,000 0 8,000 11,500 
re Dilfye ae 8 900,000 0 0 1,800,000 0 3,500 9,000 
Sa eae ee 5,400,000 0 0 3,600,000 0; 18,500 14,500 
INOWe Sls, 5 eo 1,800,000 0 10) 0 0 5,000 3,000 
Bier ereys ies 0 (6) 10) 0 0 1,000 3,000 
REREe o 0 0 0 3,600,000 0| 3,000 3/000 
LO ee we 0 0 0 0 0 4,000 2,000 
M2 Os. hae 0 6) 0 0 0 500 0 
Dec N Geena 0 0 0 0 0 0 0 
ae weal re cernsie 0 0 0 0 0 0 0 
Cea Olena ei (0) 0 0 0 0 0 0 
SP RRAI A too set 0 (0) (0) (0) 0) (0) 0 
Average...... 199 ,038 75 640,384 7,153,846 519,231 4,510 44,372 
