
28 
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 
L Zs S 5 § § § 3 8 3 = gs 
1898 28 S85 $3 ‘S38 oS Ay | Scale ses 
S83 35 SS es Se | §& | S38 | ss 
Sa ss S's S38 ARS Sa | 88 | 88 
= q a, Q Cae oe Q Q 
janieaeliee se aoc) 0 0 400 0 0 0 0 0 
Co see 0 0 100 0 100 0 0 0 
Ge Ts eau 0 0 0 0 0 0 0 
Reb aioe wae: 0 0 0 0 0 0 100 0 
SEO oy, 0 0 400 0 0 0 0 0 
CO ee 0 0 0 0 0 0 0 0 
BaD cic edh 0 0 0 0 0 0 0 0 
Midna pgs 0 0 400 0 0 0 0 0 
CON eSpace | 0 0 0 0 0 0 0 0 
Sem Serica | 0 0 600 0 0| 0 0 0 
a ame 0 0 0 0 0 0 0 0 
cee) Ore 0 0 200 0 600 0 0 0 
Atma Sire cic 0 0 200 0 0 0 0 (0) 
SOAS: 0 0 500 0 600 | 0 0 0 
EMO crthe : 0 800 400 0 1,600 0 0 0 
BIG Sek s - 0 48 ,000 0 0 3,200 0 0 0 
May 3r.3-:- 12,800 48 , 400 0) 0 3,200 0 0 0 
Seam O na eo1e 0 0 oO 0 0 0 0 0 
NIT ee oe 0 800 0) 0 0) 0 0 0 
RROAO ch wie 0 0 0. 0 0 0 0 0 
oe Ce eee 0 0 0 0 400 | 0 0 0 
ifamere Tie sinc aks 835,200 8,000 0. 120,000 200 | 0 0 0 
sere A. | 28,800 60,000 om 900,000 8,800 g00 0 0. 
ON ae eee 28,800 40,800 2,400 1,200,000 8,800 | 0 0 0 
Co OF a ae 28,800 9,600 §,800, 79,200,000 4,800) 800 0 0 
alictinveeesoio no es 0 400 2,000 5,400,000 4,800 0 0 0 
SSRI ON ap a. 0 800 18,800} 10,800,000 3,200 400 400 0 
pe el Oe a: 0 12,000 49,600, 86,400,000 3,200 400| 400 120 
eer) ON 0 63,200 66,800) 15,300,000 6,800 800 0 400 
gig, Denne 800 59,200 12,000 120,000 11,200) 2,000 0 0 
ROR ee 0 1,200 7,200 | 120,000 4,800 | 0 0 0 
mmelOieeis 0 0 3,200 0 8 , 000 0 0) 0 
Soka a ae 0 2,400 6,400 1,800,000 4,800 800 0 60 
pet Oleic ae 0 3,200 6,400 0 8,000 1,600 0 0 
Senior nc. 0 2,400 0 0 12,800 1,600 0 0 
pI lsh ek 2 | 3,000 0 0) 0 3,000) 1,000 0 0 
ee D ORT cn | 0) 1,500 0 7,000 500 0| 0 
Ol ae 1,600 100 4,800 0| 35,200] 4,800 0 0 
Osi Zee 0 0 0 0 7,000 0 0 0 
es bee 0 0) 0) 0 1,500 | 0 0! 0 
pee Oita ee 0 500 0 0 1,000 0 0 0 
os ila aa 0 0 0 0 500 | 0 0 0 
| < 
Nowe ile saeae | 0 0 0.) a 500 0 0 0 
CREE S A bins ® 0 0 0) 0 1,000 0 0| 0 
tS Bie 0 0 0| 0 1,000 0 0 | 0 
SOO cen 0 0 0. 0 0) 0 0 0 
SIERO OS Ss, Ps 0 0 0 0 0 0 0 0 
DEES \Gaaeene 0 0 0 0 0 0 0 0 
SUBS Gc cks 0 0 0) 180,000 0) 0 0 0 
9) a aaa 0 0 0. 0 0) 0) 0 0 
MO Tee ee he 0 0 0| 0 | 0) 0 0| 0 
| | 
Average...... 17,520 6,957 Be 7d) 23, 8750769 3,031 298 17 11 
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