(An asterisk at head of column indicates that all entries in it are based on 
filter-paper collections.) 
322 
TABLE I—continued. 
ORGANISMS PER CuBIC METER IN PLANKTON OF ILLINOIS RIVER IN 1898. 
= S 
1898 8.2 82 § 8 e& 3 Se 
$8 S78 is is 38 oe SS 
oS eS =. aS ‘$8 gs nS 
§ > g ) 3 S$ = $ & Q 8 iS s 8 
Jane cule acc 0 0) 0 80,000 0 0 0 
ERS Os te ete 0 0) 0) 0) 0 100 0 
de DER Sen a 0) 0) 0) 0 0) 0) 0 
Hebraic 0 0) 0 0) 0) 0) 0 
ce Ghost: 0 0) 0) 0 ) 0 0 
Darel, teak 0 0) 0 ) 0 ) 0 
TMD oes 0 ty) 0 ny) 0 0 0 
Matra ts ces ys 0) ) 0 0 0 0 0 
GPS Git ete 0) ) 400 200,000 0 0 ) 
air 200 0) 200 240,000 0 0) fy) 
SSD Oe My ree 400 0) 0) 4,260,000 0 0 0 
aR OO! ina 0) 0) 0) 240,000 0) ) e 
INSSy dae Eyam as 0) 0) 0) 240,000 ) 200 0 
ee Dh Ree 0) 0) ) 120,000 0 200 0 
TA Gh Poe 400 0) 1,200 240, 000 0) 300 0 
LO DYN Abe id 3,200 360,000 ) 0 0) 0) ) 
May: 3c 0) 120,000 0) 0| 22,400 0 0 
Dit l(a ates ) 120,000 0) 0) 200 0) 0 
Ch Sea cee? 0) 3,600,000 0 90,000 300 0) ) 
BO YS eat ie 0) 630,000 ) 0) 0- 200} 1,800,000 
Cy ON 0 60,000 0) 0) 0) 400 0 
Jane ee cae 0) 0 0) 900,000 ) 0) 180,000 
COR AN optne e 1,600 2,700,000 0 60,000 0) 800 420,000 
UNO a tat 3,200 7,200,000 ny) 7,200,000 ) 2,400 240,000 
Tis SSSA a aoe 0) 900,000 0) 0) 0 5,600 0) 
Falke Soosank 0) 120,000 0 0 0) 1,600 0 
Cg re eae 0 2,700,000 0) 0) 0 800 0 
ce ON eae 2,400 3,600,000 0) 7,200,000 0 4,400| 3,600,000 
CE Bi) ae a 3,200| 14,400,000 0) 2,700,000 0) 30,000 900,000 
INET SO) een 1,600 7,200,000 20,000} 12,600,000 ) 50,400 360,000 
LEO UB Oi ae 2 4,800 7,200,000 400| 25,200,000 0 6,400} 3,600,000 
CG agent 5,400,000 a) 5,400,000 0 800 720,000 
CS G}e) Minna 4,800 4,500,000 a) 0 0) 14,400| 3,600,000 
Cw zXO re Pee 8,000 2,700,000 800 900,000 800 43,200 900,000 
SeptuiO- anny: 800 3,600,000 0) 900,000 0 11,200 240,000 
Elona epee ena 1,000 1,800,000 0 ) 0 1,000 ) 
D0 abe so 3,000 0) 500 120,000 0 5,000} 1,800,000 
Diet ee 6,400 1,800,000 0) 0} 3,200 8,000 480,000 
Octigeaaees 0) 6,300,000 0 ) 0 2,500} 1,800,000 
OE ine Pe ) 120,000 0 0 0 2,000 0 
OE HR Selle ) 0) 0 0) 0 500 120,000 
CS OIG ed. 0 0 0 0 0) 0 0 
Nowe ene: 0 0 0 0) 0 500 0 
EDP pelete Res 0 0) 1) ) 0 0 ) 
CPG e eee ak 0) 0 0 0 ) 0 0 
oD ee 0) 0) ) 0 0 0) 0 
ACES) ON mr 0) 0) 0) 0 0) 0) 126,000 
Decy Horn nie 0) 0) 0 0 0 0 ) 
Oe Wr ieee a ap 0) 1,020,000 0) 60,000 ty) 0 0 
BONO an Be ) 0 0 900,000 0 0 0 
OY ed 0) 0 960,000 0 0 0 
Average...... 8,653 1,571,731 452 1,360,192 526 3,719 401,538 
