32 
TABLE I—continued. 
ORGANISMS PER CuBic METER IN PLANKTON OF ILLINOIS RIVER IN 1898. 
(An asterisk at head of column indicates that all entries init are based on 
filter-paper collections.) 
——————e 
8 
; a ~% = 2 
1898 S82 88 | 82 3 & § |8 8| 838 is 
S zz aS = S : = % iS 
SSE) SR | SS) Se 1) S8eh | Saag ee ee eee 
aos ae Sb ao uses ones ee os 
Janeen. a 0 0 0 20 20 20 0 60 
cam: anette 0 0 0 100 0| 0 0 100 
OR SIC ae Le 0 0 0 0 oO} 387 0 387 
Bette ice 0 0 0 0 0} 200 0 200 
rene wae) o 0 0 0 0 0 0 0 0 
ee TAS Salven 0 0 0 0 0 0 0 0 
Oe hese 0 0 0 0 0 0 0 0 
Mar te, 0 0 0 80 0 0 0 80 
Seige ae 0 0 0 0 0 80 0 80 
Rear ase 0 0 0 160 0| 360 0 520 
SR) aa 0 0 0 0 0| 1,720 0 1,720 
SEDO. sib ca 0 0 0 200 0| °140 0 340 
Aare tact a: 0 0 0 0 20} 100 0 120 
CUS A Me 0 0 0 200 120} 160 0 480 
ISIE Mee 0 0 0 2,800 1,200} 800 0 4,800 
sie Gite eae 0 0 0 57/920|  977600| 4,000 0 159/520 
May) Sate e 0 0 32,000] 419,200 0 0 451,200 
ae Lovee 0 0 0 19/200} 57.600 0 0 76/800 
cn Fils Seabee 0 0 0 5'600| 695600} 800 1,700 77.700 
ees ipa las 0| 200 0 80 200 0 0 280 
Sagi meee 0 0 0 0 0 0 0 0 
Wine 4, Jee 0 0 0 200 0 0 0 200 
Se Te eae 0 0 0 0 0 0 0 1,000 
Bey ihe 0 0 0 800 200 0 0 0 
aD are ae 4,000 0 0 0 0 0 0. 0 
elles ee ae 3,600 40 0 40 0 0 0 40 
Ca See be 0 10/000| 120 0 0 0 0 0 0 
CaO Na 85/600 80 0 800 5,600 0 0 6,400 
Brae stiattee 3/200 0 0 0 120 0 0 120 
Ie ae eae 9,600 0 40 0 6,400 0 0 6,400 
aOR 11/200 0| 200 1,200 27000 0 0 3/200 
Pp ian Wee 20/000 0| 800 800| 37/600 0 0 38/400 
a aa an 8/000, 800 0 0| 35/200 0 0 35/200 
ekevannten 7'200| 3,200| 800 s00| 32/000 0 0 32800 
Sept wok 7,200 | 1,600 0 0 19,200 0 0 19,200 
ri aan ae 1/500 0 0 500 4'000 0 0 47500 
sie DO erie 27000 0| 500 500 97000 0 0 9/500 
Cre a ee 44'800 | 1,600} 4,800 4,800} 78,400 0 0) 83/200 
Oct 4. oes 80 0 0 40 1,000 0 0 1,040 
age aed. 0 0 500 0 0 500 
fea ee 1,000 0 0 500 80 0 0 580 
tes, DBS eta 20 0 3,500 5,000 0 0 8,500 
Nevin acne 0 0 0 0 0 0 0 0 
a aaa 0 0 0 0 180 | 0 0 180 
tees Se fae 0 0 0 1,000 100 0 0 1,100 
a OD ee 0 0 0 400 400 0 0 800 
ti Dovesieeg 0 0 0 1,000 | 500 | 0 0 1,500 
Dacr. 6<eitan 0 0 0 320 1,160 20 0 1,500 
Diet eipee nf 0 0 0. 2,400! 3/200 0 0 57600 
cc DOn ion: 0 0 0 1/200 606 | 0 0 1/800 
Ls aie ae 0 0 0 "400 200| 40 0 640 
Average...... Ce lied ams i) 2,693 17,071) 170 33 19,969 
