a25 
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.) 
(Sie) (s\eyere) (eVevorois)  e(eeior elevate (eteyees (===) 
ooco oCo0oCco ofo090 coco cocoe 
~n 
: 3. 8 SS B8 3 3 S 38 
1898 28 SS 33 33 5 2 | Sees 
SS Ss SS &S 2.8 gs 38 5.8 
Ss AS 3.5 3.5 a Ss | 2s | Ss 
Ss Ss ss ss =8 Bos, || AS oS 
= a, ny x a, a, Bot cca Ree 
joe eee 0 0 400 0 0 0 0 
Cr hye ae 0) 0) 100 0 100 ) 0 
1G Oe eee Sad 0 0 0 ) 0) 0 
ING Og Me Stocea ger (0) (0) (6) (0) 0 10) 100 
ss Siotenctecres 0 0 400 10) 0 0 0 
Cie SIR SaM, eae a 10) 10) (0) 0 10) 0 0 
ON. APD ae (0) 0 0 0 0 0 0 
Wins  Jo8 (0) 10) 400 0 0 0 0 
rs Syke ates: 0 0 0 0 0 10) 0 
SS) ol aoe 0 0 600 0 0 10) 0 
Ce ops ea 0 0 ty) 0 0) 0) 0 
eet? Oa 28 He) 0 0 200 0 600 0 0 
IAS TA mN Diets (0) 10) 200 0 0 0 (0) 
vee alee (0) 0 500 0 600 0 0 
IY SOR ae ae 0 800 400 0 1,600 0 (0) 
Ee GB St 0) 48 , 000 0) 0 3,200 0 0 
Many Siete... 12,800 48 , 400 0 10) 3,200 0 0 
NOE Scan 10) 0 0 0 0 0 0 
CA eee 0 300 0 0 0) ) 0) 
LT eee 0 10) 10) 0 0 0 0 
SBS ete o. 0 0) 0 0) 400 0 0) 
ume =... -- 835,200 8,000 0 120,000 | 200 0 0) 
ae ks 28,800 60,000 0 900,000 | 8,800} 800 0 
CN es ok aaa 28,800 40,800 2,400 1,200,000 8,800 0) 0) 
CL SGC oi aa | 28,800 9,600 §,800|} 79,200,000 4,800} 800 ) 
iheiksy ~ Seasons 0 400 2,000 5,400,000 | 4,800 | 0 0) 
CO ee 0) 300 18,800) 10,800,000 3,200} 400] 400 
CC AC ae 0) 12,000 491600} 86,400,000 3,200) 400} 400 120 
ED Oe: 0) 63,200 66,800| 15,300,000 6,800) g00 0) 400 
ING OO eee 800 59,200 12,000 120,000 11,200! 2,000 0 
ee iGk an 0) 1,200 7,200 120,000 4,800 | ) 0) 
ee ton ue: 0 0 3,200 0) 8,000 0 0 
iy Cen 0 2,400 6,400 1,800,000 4,800} 800 ) 6 
(CO) eee 0 3,200 6,400 ) 8,000} 1,600 0 
Sait, Ga euees 0 2,400 0 0) 12,800] 1,600 0) 
oct, 3,000 0 0) 0 3,000 | 1,000 0) 
ED (Vee oo... 0) 1,500 0) 7,000 500 0) 
C7 en 1,600 100 4,800 0) 35,200| 4,800 0) 
Octy 406 0 0 0) 0 7,000 0 0 
CT Lae 0) 0 0 0) 1,500 0) 0 
Ca as 0) 500 0) 0) 1,000 0) 0) 
Se Oe ere 10) 0 0 0 500 0 0 
INfonis “Git eae 0 0 (0) 0 500 | (0) 0 
RE Sie 2 ) 0) 0) 0 1,000 | 0 0) 
CPS Se, ot a) 0) ) 0) 1,000 0 0) 
SOD! 0) 0 0 0) 0) 0 0) 
pearl. 3s ieus 0 0 16) 0 om 0 0 
Devon. oe eee ny) 0) 0) 0) 0 0 ) 
aise. 0) 0 0 180,000 0| 1) 0) 
oS Pap 0 0) 0 0 ) 0) 0) 
2 a 0) 0) 0 0 0 0 
Average...... 17,520 6,957 Zen ia 3,875,769 3,031; 298 17 11 
} 
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