(An asterisk at head of column indicates that all entries in it are based on 
314 
LCA sleek elie 
ORGANISMS PER CuBIC METER IN PLANKTON OF ILLINOIS RIVER IN 1898. 
filter-paper collections.) 
s % s 8 
ay = 3 3 28 
£8 5S as | $ 38 
3.0 oR wd = 
1898 ss = os =8 Ca 
So wx, as & wo 2m os 
ee gs See Ss 38 
x () ~S aces 
S eB 5 = = 
Janse 399,600,000 7,477,200 0 0) 7,200,000 
ete ee 105,000,000 3,046,800 0 0 3,000,000 
a Fe 10,800,000} 14,511,837 ) 387 14,400,000 
oy Beedoae 575,000,000 5,440,000 0 0 5,400,000 
oo peg Ae Sey: 275,400,000 400 0 ) 0 
Caml Sin eeayres 602,200,000 14,800 0! 400 0 
LSS ee eas 43,200,000 7,200,000 0) 0 0 
Wei Males cage 0) ) 0 ) ) 
ss ee 79,200,000 2,700,400 0 0 2,700,000 
Sok a ie nie a 40,500,000 9,000,600 ) 0} 9,000,000 
pee Dee aan 21,600,000 9,000,000 0 ) 9,000,000 
iat 2 Oana ae: 18,900,000 6,300,200 0 ) 6,300,000 
Mepiy 5 cyckaaeon 14,400,000 1,800,100 () () 1,800,000 
Sop STONE etd 21,600,000 2,701,100 0 () 2,700,000 
OR ey 21,600,000] 18,002,400 ) 0} 18,000,000 
SEND One 10,800,000} 190,835,200 0) 0) 190,800,000 
MER? Bois boos 42,000,000} 174,000,000 0 0) 168,000,000 
See Rantee 7,200,000| 216,057,600 ) 0 216,000,000 
Pan lisse 14,400,000] 50,443,200 ) 0| 50,400,000 
END A a el 7,200,000} 10,800,000 0 0 9,000,000 
sade S {ieee Seer 10,800,000] 14,400,000 200 0| 43,200,000 
eins Woooooe 18,000,000] 21,600,000 0 0} 14,400,000 
pola Aerio 18,000,000} 19,800,000 0 0 3,600,000 
ped Laan: 43,200,000} 43,200,000 0 0} 18,000,000 
t= 28). 25,200,000} 18,000,000 0 0} 18,000,000 
Weiby Booeee. 50,400,000|} 21,600,040 0 0} 21,600,000 
SSIETD ES strat. 10,800,000] 28,800,060 0 0} 28,800,000 
Oe Oley cece 43,200,000} 162,000,400 400 | 0) 162,000,000 
SOD Ge 7 Sees 7,200,000} 34,200,000 0 0| 34,200,000 
ING AO ene 21,600,000} 81,003,200 ) 0| 79,200,000 
Spee Olek te ak 57,600,000 |1,700,600,000 0 0 | 1,697,000, 000 
SOM ETIG I Laas 21,600,000} 212,400,800 0 800) 208,800,000 
SEReED Siemens. 25,200,000} 100,817,600] 1,600) 2,400| 100,800,000 
Pe Oe ha dee 14,400,000] 288,121,600 800 800 | 288,000,000 
Septamionnnee 18,000,000} 118,800,800 800 | 0} 111,600,000 
Nel OP eee sn! 28,000,000} 378,013,500 ) 0| 378,000,000 
eed OM aie 50,400,000} 72,008,000 ) 0} 72,000,000 
Se ADT mn 68,400,000| 111,614,400 0 0} 108,000,000 
Oct e ton sen 34,200,000} 23,400,000 ) 0} 14,400,000 
Weta lid Steg sae 21,600,000} 28,803,500 0 0| 28,800,000 
Sy ns eee 86,400,000 3,600,500 =) 0) 3,600,000 
Sega med 1,800,000] 52,201,560 ) 60) 52,200,000 
Noe Desens 93,600,000} 21,601,000 500 0; 21,600,000 
Ones 176,400,000! 10,800,000 0 ) 7,200,000 
ES Ae 190,800,000} 10,400,000 0 0} 10,400,000 
oe DD paar 124,400,000 7,200,000 0 0| 7,200,000 
ty EDO eee 57,600,000 7,200,000 0) ) 7,200,000 
IDX AGey Ao Gd 136,800,000| 14,400,000 0 0) 14,400,000 
Se Shae 468,000,000} 54,000,000 0 0. 54,000,000 
sc 2 Oh ane 640,800,000} 59,400,000 0) 0} 59,400,000 
OT, atest 497,200} 37,800,000 oO 0) 37,800,000 
Average...... 55,428,792 85,909 ,984 83 | 93) 83,059,615 
Oscillatoria 
spp. 
277,200 
46,800 
111,456 
39,600 
400 
14,400 
93477 
0 
400 
600 
0 
200 
100 
1,100 
2/400 
35,200 
19,200 
57,600 
43,200 
0 
200 
Chlorophycee 
Total 
14,400,200 
9/000; 200 
108 000/386 
9,000,500 
9/014;800 
3,600,400 
e150 
400 
3,600,400 
22,502,800 
600 
2,704,200 
2,700,300 
1,980,100 
55,800,800 
135,906,400 
212,406,400 
194/531,200 
64,901,200 
12/602;200 
27,001,600 
21,616,000 
46,801,000 
21,658,400 
34,260,800 
9,049,200 
10}851,200 
277,340,400 
31,651,600 
45,304,800 
370,948 .400 
68,468,800 
108,200,000 
189,334,400 
87,489 ,600 
54/042,500 
57,684,500 
70}526,400 
27,024,000 
14,420,000 
15,312,500 
28,833,000 
14,408 ,000 
3,604,000 
34/205 ,000 
16,206; 000 
7,205,000 
13,500,000 
84;600,500 
58,500,000 
27,000, 200 
53,175,104 
