Biol) 
eAS Bren: 
ORGANISMS PER CuBic METER IN PLANKTON OF ILLINOIS RIVER IN 1898. 
I—continued. 
(An asterisk at head of column indicates that all entries in it are based on 
filter-paper collections.) 
8 
2 3 s § 
x ~ 2 o 
1898 2 gs s8 =s 88 88 SS S 
TS S& gs S8 ss SS Ss st 
= SS BSE BS SS S38 QS “S28 
s$ e8 53 fs | 33 Se 8 ss 
x Sa S C Q Q Q = 
7S ae 0 0 0 100 0 0 0 0 
eee 240 0 0 200 0 0 0 0 
AS eas 154 308 0 0 0 0 0 0 
BeBa™ Bipci4 50: 0 24 0 0 0 0 0 0 
Sr yes 0 0 0 0 0 0 0 0 
OS aes 0 0 0 0 0 0 0 0 
Spc) Seen 0 0 0 0 0 0 0 0 
MaRS 5 Tn 0 80 0 80 0 0 0 0 
etre oes 0 40 0 40 0 0 0 0 
SP GUGH A, 6% 0 120 0 440 0 0 0 0 
OS ie 0 280 0 480 0 0 0 0 
EOC aa 0 20 20 240 20 0 0 0 
Reh eS chins 20 100 40 200 0 0 0 0 
cena 20 60 20 200 20 0 0 0 
SaEStOM a) se 200 100 0 0 0 0 0 0 
Sy en 0 800 320 800 0 0 0 0 
May <3.....: 0 2,800 | 0 0 0 0 0 0 
MRO 5; 0 3/600 400 600| 600 0 0 0 
RN 8 i. 200 3/500 400 3,300} 300 0 0 0 
a aa 480 51920 2,960 7'880| 440 160 0 0 
Pek ea 40 33/920 8/720 5/040} 1,000 720 40 0 
Tage) ers oo. 200 62,800 55,800 600 | 3,400 11,600 0 0 
ein s - 0 6,000 10,600 200} 2/400 97200 0 0 
Oh cr 100 1500 400 0| ‘100 0 0 200 
cos a a 200 700 0 0 0 0 0 100 
Wale nS 0 200 0 40 0 0 0 400 
ee aaa 0 180 0 0 0 0 60 120 
RAO! 3 0 0 0 160 0 0 40| 1,040 
eG lc 0 180 120 0 0 0| 8,580] 1,080 
JN ee 0 40 0 0 0 0| 6,960] 3,520 
CSTE 5) ane ites 0 0 0 0 0 0 360 360 
Ca 0 0 0 0 0 0 60| 1,260 
Pe Ot 0 0 0 0 0 0| 1,020 900 
UT ae ea 0 0 40 0 0 o| 2;520| 1,440 
Soe eae 0 0 40 0 0 0 240 440 
aie at 0 0 0 60 0 o| 1,800] 1,560 
OO id ts 0 60 0 60 0 0 960 480 
aT Sykes: 0 0 100 | 0 0 0 400 500 
OG ae re 0 0) 0 40) 400 0 880 120 
ss tae 0 920 | 0 0; 600 0 400 40 
a: Wee 0 1,360 0 80 80 0 560 0 
ss erie 0 840 | 0 120 60 0 0 0 
Mrs, Wlavnst es 0 60 0 60 0 0 0 0 
St Tiga eal 0 0 0 0 0| 0 0 0 
Se iGe rs 4 0) 100 O 0 0 0 0 0 
PIO Ct 0 0. 0 0 0 0 0 0 
ye OG b ae 0 0 0 80 0 0) 0 0 
BEM Gin 0 40 20 | 200 0 0 0 0 
CC gt inte ae 0 140 40 220 0 om 0 0 
SS Oe ie: 0 120 0 160 0 0 0 0 
Ey org 0 0. 0 280 0 0 | 0 0 
| | 
Average...... 36 2,441 | 1,539 422) 181 417 | 479 261 
