Sai 
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.) 
=: 5 8 * 
1898 as & 32 3 ae ge ye 
Sick S & ae 83 Ss a 
Sgss 3S ¥§ ¥§ us ee 
q q Ss) Q g Q° 
Bane iss 0 0 10) 0 0 (0) 
oS 7A beats ee 0 0 0 0 100 0 
ree Oe ates se 0 (0) 0 0 (0) (0) 
Rebs. me Sierecest.s 0 (0) 0 0 0 0 
Fe See 10) 0) 0) 0 (0) 0 
oe AL Datos ce 2 0 0 10) 10) 0 0 
Se SOD As een 0 0 10} 10) 0 (0) 
Mari Wicts..s% 0 0 0) 0 0 (0) 
es Sloe esis 0 0 0 0 0) (0) 
PRLS oyegt yea 0 3,600 (0) 40 ,000 0 40,000 
OAs 0 800 0 (0) 0) 0 
poem LOR. arte 0 2,600 0 0 0 0 
/NOiSs Na ae 0 2,800 0 O 0 (0) 
hi ke eas 10) 1,800 100 0 0 (0) 
one sills eee 9,960 36,000 10) 0 100 0 
Be ZO aN: on 1,830,400 240,000 800 10) 0 0 
WIE Ghee 4,883,200 240,000 0 0 3,200 0 
pres Oli i 24,608 ,000 48 ,800 10) 0 0 (0) 
Pee Med a5) ss08 28 ,800 32,800 10) 90,000 0) 180,000 
pee? Aree Oe. 2 (0) 1,000 0 (0) 10) 0 
eS U5 epee 0 400 0) 0 0 0 
Afibare Sy fearaeneeene 0 9,600 10) (0) 0 
[te ee 10} 60,000 0 900,000 1,600 0 
oO ned eee (0) 30,400 10) 2,400 0 
Re eR ZG iso aa 0 4,000 0 10) 0 1,800,000 
Bays 05 rect. 0 400 400 0 800 0 
pe os aces 0 800} 4 400 (0) 1,200 0 
pees Tals i 3 aaron 0 7,600 0 10) 400 3,600,000 
Bommel 6 ee ovens 0 4,000 0) (0) 2,400 3,600,000 
ING 7 eee 0 8,000 800 120,000 3,200 1,800,000 
¥ Ola erst 0 400 800 0 1,200 3,600,000 
BLO em ane (0) 800 800 120,000 (0) 3,600,000 
ee DOR kee 0 3,200 1,600 0 6,400 120,000 
ae POOR. us 0 2,400 800 0 3,200 4,500,000 
WED EN Ol. otis a 0 40 1,600 900 , 000 10,400 5,400,000 
Nn ea peerene 0 500 0 (0) 1,500 3,600,000 
pe a2 Ole. as 0 2,000 1,500 0 . 1,000 1,800,000 
eo ieee oe 0 1,600 6,400 1,800,000 9,600 9,000, 000 
iota 4 te 0 0 1,500 3,600,000 1,000 2,700,000 
api i cence 0 0 1,000 1,800,000 500 1,800,000 
PMR Sy see 0 0 0 0 0 900 , 000 
ey eerie 0 10) 0) 0 (0) 
INOVeN eicaek 0 0 0 0 0 0 
a oh Saas (0) 0 1,800,000 0 0 
Samel Sr os san 0 0 1,000 0 0 1,800,000 
Peo ets mics 0 10) 0 0 0 
ch gO eee 10} 0 0 0 0 120,000 
Wee: 2 Gkiacce 2 0 0) 0 0 (0) 0 
bal SPs eiaberens 10} 500 10) 0 0 0 
ZO re in, o 22 ,000 0 0 10) (0) 0 
ee tee 0 0 0 0 0 0 
Average...... 603,911 14,362 375 214,807 963 960,769 
