328 
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.) 
8 
é ela te 
gs as 3 SES 3 3 
fet PES) ae | ee ees eee 
82 Ss a8 ge | ss ee eS 
S38 ss a) ES Ss ss Q 
S S = ay e ce = 
Wage tlle kre 0 0 400 0 0 400 6,180 
ca lege ae 0 0 45,100 0 0| 44,500 4’ 040 
See ae 0 0 90/171 0 0| 89/379 35,274 
Betis toe see 0 0 3,800 0 0 3,800 7,696 
IRE EA St 0 0 6,800 0 0 6/800 7360 
Some tiion cp gee 0 0 18/000 0 0| 27,000 12/240 
De a 0 0 25,272 0 O| > 25.272 93,377 
Mare! dene 0 0 1,600 0] 400 800 18,320 
a een 400 0 4°040 0 40 4,000 23/960 
CS a 0 400 22'160 30| 400] 19/200 80/980 
OO aE 0 400 10/440 0 40! 10,400 1747680 
LS os Bes 0 20 1/620 0 20 1/600 109/240 
Rese cues yl ae 0 0 1,100 0 0 1,100 81,920 
oa Dae a 0 0 960 0 60 800 53/480 
co (yer geod a 0 400 3,300] 400] 100] 16,000 745 | 300 
WRG GT ip es 0 3,200 4°640 0| 640 3200] 2,889,720 
May» Sis ante 0 0 16,000 0 o|- 12,800] 5,231,800 
Cet we 0 200 14400 0| 1,600] 11,200| 2'647,200 
Cena a thse wa 0 800 20/800 0| 6,400] 10,400] 1,438/300 
Bo Bae ele 0 3,200 1/040 80} °520 400 191/780 
CE Daa ae ome 0 18,600 880 80| 200 600 161,080 
Tamer ere 0 392,000 800 0| 800 0 507,000 
i Ne 0 1/600 600 0| 400 200 637,400 
7s ane 3,200 0 1,100 0| 300 800| 2,593,600 
cme ati 0 0 1/900 0} 800 300! 1,1127500 
aly Leen ca 0 800 2,480 80| 1,600 800 146,920 
i Sos ares 0 0 4'300|  400| 2/000 2,400 178/100 
coer ey | aie 0 0 2'760| 1,600| 360 800 933/320 
5) ei Se 0 0 120 0 0 60 268,480 | 
Ayes: Oat 0 0 1,400 0| 560 40| 1,260,840 
Ca Ota apaee | 0 0 1/200 0 0} 12,000 775920 
SG cte He | 0 0 4.120 0| 120 4’ 000 907,260 
Hes Pog th 3 1,600 0 5720 0 60 5600 671,260 
Ty et eee 1/600 0 47080 0 80 2'400 415,000 
Sr re ae 0 0 9,640 | 2,400 40 4,800 413,200 
SMU ec 0 0 21,000} °500|1,500| 17,500 171,960 
Co (earn | 1,000 0 6.000} 1,500| 500 3/000 460,360 
Ct oe ee Ae 14/400 0 13'300| 8/000] 300 4'800| 1,744,200 
OGh, Mees ee | 2,500 0 2,280| 2,000) 120 160 97,160 
Ce eit Cae 2'000 0 2'000| 1/000! 500 500 115500 
CE aa ae 0 0 540 0 40 0 188/160 
Os ak Mins Mae 0 0 3,500 0| 1,000 2,500| 1,045/120 
Nowa tase 0 0 3,060 0 60 3,000 152,680 
(Go ene 0 0 1/180] 120 60 1/000 146/600 
£68 Wg Gage 0 0 100 0| 100 0 180/500 
to, Saat lisiee 0 0 400 0| 400 0 126.000 
th 59 Scam 0 | 0 0 0 0 0 66/000 
Dee. Aca | 0 0 20 0 0 20 64,260 
8) sae 0) 0 600 0) 0 600 159/140 
\_ S90 eae 0. 0 0 0 0 0 191/320 
Cry hee S| 200 0 20 0 20 0 50/120 
Average...... 517 8,108 405,983 | 351| 425 6,688 571,611 
Anurea 
aculeata 
eooo 9o0oO 
1,839 
