316 
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.) 







x 3 
= ” ” ay BS 
Sy Se = SS 
=s = S% 5 Sx S5 
aS a> 2 is} S35 
1898 35 LVS 3 Ss 5 Bs 
a5 Ss 88 33 SS gs 
SS s&s ss 85. 35 8 
ws H 4 A 4 H a 
ian ell Sees 0 0 0 0 14,400,000 0 
oe DM Ae, 0 0 0 0 6,000,000 0 
ic See 0 0 0 3,600,000 7,200,000 0 
Rebs 303 ase 0 0 0 0 9,000,000 0 
ae Sie Sarees 0 0 0 0 9,000,000 0 
wae lie sesntane nt 0 0 0 3,600,000 43 ,200 ,000 0 
ee A tactiess 0 0 0 0 0 0 
Mary (ae es ce: 0 0 0 0 0 0 
os Siac there 900,000 0 0 900,000 1,800,000 0 
tO caterers 5,400,000 0 0 0 17,100,000 0 
ee AD Mowatt 16,200,000 0 0 0 7,200,000 0 
© ee parce 0 0 0 | 0 2,700,000 0 
Aiprs= fine sar 0 0 0 | 900 ,000 1,800,000 0 
oe 2a ae 0 om 0 1,800,000 0 0 
aed Oi ea ae 7,200,000 0 0) 1,800,000 46,800,000 0 
Se DOR ae ses: 0 0 900,000} 13,500,000!) 108,000,000 0 
WER? Bo ooo oe 24,000,000; 1,800,000 0 23,400,000 |} 150,000,000 0 
ete LOR ae tars 7,200,000 0 1,800,000) 70,200,000 50,400,000 0 
sae “ily Pek enemas 7,200,000 0 0 34,200,000 21,600,000 0 
Or ce eee 3,600 , 000 0 0 5,400,000 3,600,000 0 
rie Wola 3,600,000 0 0 3,600,000 14,400,000 0) 
Jame: i ss c.as 9,000,000 0 900,000 1,800,000 9,000 , 000 0 
Po OLA Sf icle 21,600,000 0 900,000 0 21,600,000 0 
ty U2 eet. 0 0 0 7,200,000 10,800,000 0 
SR Sinatra 1,800,000 0 0 10,800,000 10,800,000 0 
Ifuikys “Sino soae 1,800,000} 1,800,000 0 1,800,000 3,600,000 0 
ees Ae 1,800,000 900,000 0 4,500,000 1,800,000 0 
ee Oye ha 75,600,000} 3,600,000 10,800,000 79,200,000 25,200,000 0 
So DOs a 5,400,000 0 1,800,000 900,000 1,800,000 0 
WNicten Don gags 7,200,000 0 0 9,000,000 12,600,000) 1,800,000 
ie ORES stage 57,600,000 | 19,800,000 36,000,000 39,600,000 28,800,000} 1,800,000 
Fina nai lec teste 7,300,000, 7,200,000 1,800,000 12,600,000 7,200,000 |} 3,600,000 
de DOT re 3 ees 1,800,000 0 900,000 17,100,000 46 ,800 ,000 900 , 000 
Boke SO) et ras 18,000,000, 3,600,000 2,700,000 54,000,000 46,800,000 | 7,200,000 
Septs) Ome cer 900,000 0 8,100,000 12,600,000 50,400,000 | 3,600,000 
Some SIE, cp 0 0 3,600,000 16,200,000 10,800,000} 1,800,000 
ice AOR RS ata 7,200,000 0 0 5,400,000 28,800,000 0 
ee BON ee eee 10,800,000 0 3,600,000 12,600,000 28,800,000 0 
Oct... 4a sano 5,400,000 900,000 900,000 7,200,000 9,000,000} 1,800,000 
ree A ert eee 0 0 | 0 5,400,000 3,600,000 0 
set SL QEN a Rr 1,800,000 (0) 0 4,500,000 5,400,000 900,000 
pete Doc oe 0 0 1,800,000 10,800,000 7,200,000 0 
INGWASe ei 0 0 0 1,800,000 10,800,000 0 
ee Sieve tc 0 0 7 0 1,800,000 0 0 
aati bes) Sar ey eae 3,600,000 0 1,800,000 0 21,600,000} 3,600,000 
OPEL emeae 3,600,000 0 0 1,800,000 10,800,000 0 
ie LD es Econets 0 (0) 0 0 7,200,000 0 
Decy 65.255. 0 0 0 0 12,600,000 0 
Se Wel Olevecs meet 0 0 0 900,000 82,800,000 0 
mete 2 Ol rns 0 900,000 0 0 57,600,000 0 
ca AY [ips ee ae 0 0 0 0 27,000,000 0 
Average...... 61,230,769 778,846 1,505,769 9,276,923 21,450,000 519,235 





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