So 
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.) 
“s ~ 
s = | pal S aoa E 
on Ss eo © | coy OS | o 8 “ % | = = 
= Se SoS lows 2 = § = Ss = | &§ 
1898 Sees | &es QS ges Soe wee, | oes 
S88 Se S28 S28 Sees | sass | ase 
esis Sgs Se mp esicrs Sees | sas 6a 
na) m9 Ra) ee | 9 | a 
ines 
Uist 0| 0. 0) 0) 0) 0 0 
Diesen 0. 0. 0) ) 0 0) 0 
De we 0. 0 0 ) 0 0 0 
Bee ney 0 0 0. 0 0 0 0 
eae: 0 0 0 0 0 0 0 
ite 0 0) 0 0 0) 0 0 
TS Bere 0 0 0 0) oy 0) 0 
‘et eee 0 0 ) 0 0 0) 0 
Cet 0 0 0 ) 0 0) 0 
Se SS: 0 a) ) 0) 0) 0) 0 
Does 0 0 0. 0 0 40 0 
Bone a 0 0 ) 0 ) 0) 0) 
Bree et 0 0 0) ) 0 0 0 
Deane 0 0 0) ) 0 0) ) 
HOE te 0 0 0 0 0 0 0 
DOM eee 0 0) ) 0 ) 0) 0 
Boe gee ) ) 1) 0 0 0 0 
IQs oa coe 0 ) 0 0 0 0 0 
dyin tenet 0) 0) 0 0) 0) 0) 0 
Dae ee 0) 0 0 0) 0. 0 0 
Bile t ert 40 0 0 0) 0 40 a) 
cise ewe 0) 0 0 0) 0) 0) 0) 
fase oO 0 ) 0 0) 0 | 0 0 
Pa Gente 0 0 0 0 0) 0 ) 
Dic ls ae 800 0 0 ) 100 | 900 ) 
See 400 0 0 0 400 800 | 400 
Ne eee ny) - 60 0 0 1,200 1,660 60 
Cee 920 1,200 40 0) 0) 2,160 2,520 
BERS aces 0) ) ) 0 0 0 
De ete 0 0 0 0 0) 0) 0 
Gia pices 400 ) 0 40 0 840 800 
HOS von ee 800 0 0 1,600 0. 2,400 5,600 
Te a 0 0 0 0) 0) 0 
BOwee Se 0 800 800 800 800 5,600 2,400 
Ga eee 300 0 800 1,600 4,000 7,600 5,600 
ie eige 500 0) 0) 2,000 ) 4/500 4,000 
DO acs 0) 500 0 0) 0) 500 500 
Tepe ae 0) 0 ny) 0 1,600 3,200 0) 
Ae 40 0 0 0 0) 0) 0 
Melk as See 0) 0) 0) ) 0) 0 0 
AG Set et 0 0 0 40 0 40 0) 
ttn ates 0 0 500 0 0. 500 | 0 
Ay ae 0 0 0) 60 0) 60 0 
aan 0 ) 0 0 0 0 | 0 
fisreree g 0 0 ) 0) 0 0 | 0) 
Do ae 0 0 0) 0 0) ) 0 
Od tee 0 0 0 0 0) 0) 0 
aes ) 0 0) 0 0 0 0 
ie ee ) 0 0 0 0) 0 0 
20 ae 0) ) 0 0 0 0 ) 
Dene eee 0 0| 0 0 0| 0 0 
| 
| | 
Average...... 90 49 41 | 118 155 592 | 420 
| | 
