oad 
TABLE I—continued. 
ORGANISMS PER CuBIcC 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.) 
| | 8 | | S 8 | 
a ey ee 38 2 | 35 | 5 5 
Pema eee es a eee | 3 
83 88 As SS ez | €8 as aos 
is] S Se = Ss = » ep 
Pepe ed cers ee bee oboe” 
ante tes fc: 300 80,000 300 0) 0 0 6,580 0) 
ORD Se bes 300 40,000} 28,800 0 100 0 49,240 0 
Somes eee ah 58,437 0} 11,997 0) 0) 0) 126,603 ) 
Reps ttess! 5,900 0} 1,000 0 0 0) 11,496 0 
ChB ae Be 3,000 0) 800 0 0 a) 14,160 0 
ln hae Sees 5,200 0) 800 0) 0 0) 31,040 0) 
SE ae 15,795 | -720,000 0 0 0 0 48,649 0 
Mar, cl... 10,000 0) ty) 0| 1,600| 1,600 20,400 400 
UE Te ean 8,400 ) 520 0| 1,600) 1,600 29'200 800 
ee; oo | 33,200 0) 1,000 0} '400) ‘400 103,940 400 
me O's a Ree 41,600 60,000 80 0} 1,200! 1,200 185,520 400 
OF SSK ae 30,400 0) 0 Ol) Doo|| © Doo 115,880 5,020 
Pry AS oe - 20,500 0 20 300 100 0 84,820 1,800 
Own crt 20'100} 900,000 0) 200 100 0) 54,540 ) 
WB IOS eces 453.600 0 0) 400 0 0 749,000 0 
a Gen 614,400 0 a) 12,800 ) 0] 2,892,360 4,800 
May Se cen: 736,000 0 0} 720,000 a) 0} 5,247,800 0 
TS. SiC aa 78,400 ) 0) 24;000 0) 0| 2,663,400 200 
Os eee 72.000 0) 0) 10,400} 800] 800] 1,465,500 800 
Ste Woy ene 74,200 0) 0) 400 0 0) 196,020 3,200 
Sty TENTS te 61,200 a) 0) 400! 200! 200 180,760 18,800 
Noneh 1,499,200 60,000 0 14,400 0 0) 903,000 392,000 
CM AN A 532,800 0) 0} 104;000 0 0 639,600 1,600 
SNe aaron 195,200 0 0) 74,400| 800 0} 2,601,200 3,200 
As Dai hes 45.600 | 3,600,000 ) 33,600 0) 0] 1,118,400 0) 
cia | 13,600 0 0 4,800| 7,200| 7,200 153,000 800 
CoS Sipe ieee aN 35,600 2,700,000 0 5,600} '400| ‘400 184,500 ) 
See AOr 24/000 0 0 2,800! 400| 400 946,080 0 
SD Gee Oy | 2,000} 120,000 0 3,600 0 ny) 370,200 0 
Nags! 2'= 5.2. | 23,200 | 1,800,000 0 95,200 ty) 0| 1,294,240 0 
On 8,400 0) 0) 4: 300 ) ty) 782,720 0 
REMI Gic ee oh: 20/000 | 0 0) 8,800 0) 0 935,380 0 
CeO ky, 26,400 | 0. 0) 5,600} 1,600) 1,600 696,180 1,600 
Sees! Ae 51,200. 0) ) 800 ) ) 435,080 1,600 
Sept Oa. 13,600 0 40 0 0 ty) 422,840 0) 
os er ara 49/000 0 120 2,000 0 0) 197,960 0) 
fama ON ve ced 34,500 0) 0 20,000| 500 0 475.860 1,000 
Oo CNG fit an 92800 0 200 22/400 0) 0] 1,792,700 14/400 
crate! . ae 23,000 ny) 0 1,500 0) 0 105,020 2,580 
5 a aoe 23,000 0) 40 500 ) 0 122,000 2,000 
Pe Ge noel. 47,000} 900,000 0 1,000 40 40 159,200 0 
Lae 23/000 | 0 0) 0) 0) 0| 1,048,620 0 
Nona a | 12,500 ) 60 | 0 0) 0 156,300 0 
aan 70,000 0 0) 0 0) 0 147.780 0 
ae ASC 35.000 ) 100 0) 0 ) 180,600, 0 
Un Sy eee a 2,000 0 ) 0) 0 0 128,400 0 
Bae Ono Bak | 2,000 0 0 0 0 0 66,000 | 0) 
Wee: abe ce: 40 0 0 0 (0) 0 64,280 | 0 
in ale eet eee 300 | 1,080,000 ty) 0 0 0 159,740 | 1) 
CODY ous dee 200 '120;000 0 0) 0) 0 191,320 0) 
CI oy PR nee 200} 120,000 0 0 0) 0) 50,540 200 
| | 
Average...... 101,024 255,769 | 882 22,590} 332] 301] 592,416 
