316 
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.) 
: 
on n 20 SS 
SS S% SS 3 : ES 
SS NE s% = 8 Sx ss 
1898 ES 8.8 SS S'S ss 3:3 
Ss Rs Ras B38 §.% gs 
RS = S33 aS SS 8 
es S 80 & 8 3 o 3 2 ae 
Vetsisy bile cine 0 0 0 0 14,400,000 (0) 
SMD cris ast acahe 0 0 0) 0) 6,000,000 (0) 
NSD eee a ae 0 0 0 3,600,000 7,200,000 0 
BR@b: 143%.5,28: (0) (0) 0 0 9,000,000 (0) 
ee Sie erste 0 0 10) 0 9,000,000 0 
So rs racpectereus 0) 0 0 3,600,000 43,200,000 0 
st eD Deee tel os 0 0 0 0 0 0 
Meat) SdCcis events 0 0 0 : 0 0 
a Sisnate.< 900 , 000 10) 10) 900,000 1,800,000 0 
So AGG Sah dhe 5,400,000 0 0 0) 17,100,000 0) 
Stan OR ta 16,200,000 0 0 0 7'200,000 0 
a AS a 0 0 (0) (0) 2,700,000 0 
Apri. sds sche 0) 0) 0 900,000 1,800,000 0 
Bo Lata 0 (0) 0 1,800,000 0 0 
SO aN Ae 7,200,000 0 0 1,800,000 46 ,800,000 0 
SO LE2O cicebaee 0 0 900,000 13,500,000} 108,000,000 (0) 
Mary Sr eres 24,000,000} 1,800,000 0} 23,400,000} 150,000,000 0 
SaTeliOn tetas 7,200,000 0 1,800,000 70,200,000 50,400,000 0 
Pat bi Rene eaenieste 7,200,000 0 0 34,200,000 21,600,000 0 
UEDA esate 3,600,000 0 0 5,400,000 3,600,000 0 
SP emolvenen aero 3,600,000 0 0) 3,600,000 14,400,000 6) 
rane S17 tiae 9,000,000 ) 900,000 1,800,000 9,000,000 ) 
ee WAS. rata es 21,600,000 0 900 , 000 0 21,600,000 10) 
Oe hae 0 0 0 7,200,000 10,800,000 10) 
PRED Start sh chore 1,800,000 0 (0) 10,800,000 10,800,000 0 
ithe Mijn 1,800,000] 1,800,000 0) 1,800,000 3,600,000 0 
nly LIZA eon 1,800,000 900,000 0 4,500,000 1,800,000 10) 
oe BNO ae pee 75,600,000} 3,600,000 10,800,000 79,200,000 25,200,000 (0) 
ogee hee 5,400,000 0 1,800,000 900,000 1,800,000 0 
NGG Rests Coe sae Be ds 7,200,000 0 0) 9,000,000 12,600,000! 1,800,000 
Baty (oe. ene 57'600,000 | 19,800,000} 36,000,000| 39,600,000} 28,800,000] 1,800,000 
See Mel Olan eke 7,300,000 7,200,000 1,800,000 12,600,000 7,200,000) 3,600,000 
See DS ire haan 1,800,000 0 900,000 17,100,000 46,800,000 900 ,000 
Sey WO Olent ets 18,000,000} 3,600,000 2,700,000 54,000,000 46,800,000 | 7,200,000 
Sept Ons acre 900,000 0 8,100,000 12,600,000 50,400,000 | 3,600,000 
OP aaa as 0 0) 3'600,000| 16,200;000| 10,800,000} 1,800,000 
ot) DO een a 7,200,000 0 (0) 5,400,000 28,800,000 (0) 
aoe BED arate 10,800,000 0 3,600,000 12,600,000 28,800,000 (0) 
Octave 5,400,000 900,000 900,000 7,200,000 9,000,000} 1,800,000 
hag ol) eden 0 (0) 0 5,400,000 3,600,000 0) 
so S91/ Sh trae 1,800,000 0 0 4,500,000 5,400,000 900,000 
Oe BIG pani 0 0) 1,800,000} 10,800,000 7'200;000 ) 
INO Valero 0 0) 0 1,800,000 10,800,000 ; 0 
sa Sescrad se 0 (0) 0 1,800,000 0 0 
ame 3 USTs 3,600,000 0 1,800,000 0 21,600,000} 3,600,000 
a CODEN tees 3,600,000 0 0 1,800,000 10,800,000 0) 
oe DON Rowe ae 0 (0) (0) 0 7,200,000 (0) 
Wee-- Oi. vaene 0 10) 10) 0 12,600,000 0 
See eases elo 0 0 0 900,000 82,800,000 0) 
AUS ante se 0 900,000 0 0 57,600,000 0 
seine A ecto Ke, 0 0 0 0 27,000,000 (0) 
Average...... 61,230,769 778,846 1,505,769 9,276,923 21,450,000 519,235 
