TABLE I—continued. 
336 
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 
= 8 8 
ns > ~ 
bp sf 3k m & 3 = 
1898 m8 S38 53 s&s S 8 3 
= = = 00 8.8 Os Cie a8 
ora 28 [882] Ss 5a 26 HS 
~ Ly S 
an S S ny a a a 
Tanee diet. see 500 0 0 0 700 0 100 
ie ee aes 200 | 0 0 0 1,380 0 440 
SO SD ghee: 6,579 0 0 0 4°788 0 462 
Bete y eee 300 0 0 0 216 0 24 
Ce eee A 400 0 0 0 320 0 0 
ce sian oe 5,600 0 0 0 1,200 80 0 
yy ae 0 0 0 0 3,285 0 0 
Mase tite: 1,200 80 0 0 804 0 160 
Geek Bh dip 800 0 0 0 3,080 40 80 
Ca ee 3,960 0 0 0 12880 40 560 
Gh potent at 4'000 | 40 40 0 19'440} 320 800 
ODO BI 3,200 | 100 0 0 22,180 160 360 
Rope Soe 1,100 300} 200 0 34,560| 200 360 
eR aeseene 1/000 | 200; 100 0 28/060, 320 320 
co {Oye ee 84/000 | 400 0 0 34/200, 200 400 
Ca TGs gat 38/400 | 3,200 0 0 56,800| 800 1,920 
Mey ni3 eo 278,400 | 9,600 0 0 204,800 0 2,800 
40. bs. 91600 38/400 0 0 235.400| 400 5600 
Semi ae 56/800 17,600 | 3,200 0 182/300| 1,600 8,500 
CER ee 97400 600} 200 0 167,080} °400 24/080 
cc O34 as ye 12,000 1,000 0 0 162/800} 440 51,480 
Nate’. t7eice oe 11,200 200 0 0 438,800 | 1,600 136,000 
Oe Ae at 131600 0 0 0 211,400| 400 29/200 
oy eres 257600 800 0 100 83/100} 200 2/300 
ON ae 51,200 800 | 0 500 45/600, 400 107100 
Talges Soe oes 47,200 | 400 0 | 1,600 4,920} 440 640 
CTR 1 aan 16/800 1,600, 400 1/200 1/620 60 360 
10 ys 34/800 4°000 0 9'200 14/040 0 1,240 
UDCA ee 4800 28000 | 1,600 99600 23/000 0 97960 
Aups 242.0. 178,400 18,400 | 1,600 30,400 22,160 40 10,520 
CS ra ara 20/000 4/400 | 1,200 4000 47120 0 1/080 
Co Cee 10/460 | 3,200 0 22/400 4°500| 800 1/320 
Ge I 8. iy ei 35/200 4000 | 0 17.600 17,340| 180 1/820 
CO se 7/200 6,400 | 0 14/400 27/080 0 47040 
Scents Gaver 0 0 0 0 9,080 0 720 
ee ea Nae 9,500 1,000 0 5,000 . 24'720| 500 3,420 
DOL eae 17,500 | 500 0 5,500 21/880 0 1/560 
ar) ares 38/500 14,400 3,200 191200 99/300 0 1,100 
Oct. Aovs.% 0 1,500} 500 2,000 33,880 0 1,320 
foe dah OES 2,000 0 0 2000 | 34/060 | 0 27000 
a gies ta 10,500 1,500} 500 500 25,640 0 2°120 
Ce oe ee 78,000 500 | 0 0 26/020 0 1/020 
Nowe ceo. 29,000 0 | 0 60 8,600 0 120 
a 41/060 0. 0 0 15/080 0 0 
MISE et 60/000 0 0 0 13/100 0 100 
pele ig 66,000 0 0 0 13,920| 320 2,800 
NOC ene 500 500| 500 0 6,180 0 80 
Deer once 0 0 | 0 0 9,740 0 260 
Cae eee 800 0 0 0 21,740 0 240 
coh 2,600 0 0 0 2/440 | 0 400 | 
Ce Bae is 400 40 0 0 6800 0 280 
| - 
Average...... 31,620 31475) 2 255 4,524 47,042} 1914 6,241 


