TABLE I—continued. 
mS i) 
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.) 
g a g g 3 
1898 os Se ss =|), 58s 38 os8 88 SE 
SS) ENTS HESS ess Sige: as ass 8 Soe 
ges Se (Sees | Ses ale GAS ES Soi 
o4n S Se => Qs os a 
a NSS) ae et = a a es 
MT cc erenaite 100 0 0 10) 0 0 0 100 
Dillisvis eS. cus 100 0 0 40 40 0 0 0 
eee eae salto 0 0) 0 10) 0 0 1,548 
Scien 10) 0 10) 0 0 0 0 100 
Bit ses Se 10) 10) 0 0 0 (0) 0 0 
US eae ae 800 0 10) 0 10) 0 0 2,400 
DOI. ae 632 0 0 10) 0 10) 0 3,791 
1 I ae 480 0 0 80 80 (0) 10) 480 
Sierras 160 0 10) 0 0 0 0 840 
SPS eee 1,000 0 0 160 160 0 (0) 400 
DD need 2,920 0 0 2,000 2,000 400 0 440 
DOs! 420 ) 0) 1,800 1,800 1,200 0 20 
Sere sea 20 0 0 700 700 400 0 120 
De rts 240 10) 0 140 140 60 0 200 
1 fo ee eS 5,200 0 0 400 400 10) 0 0 
DOM Pee 324,280 10) 10) 6,400 6,400 0 0 0 
Bie ea eens 661,200 0 0 0 0 0 10) 41,600 
Or Orta 118,400 0 0 0 0 0 0 9,600 
Nee ae 101,700 0 0 (0) (0) 0 0 800 
Oe ae ae 1,040 (0) 10) 0 0 10) 200 80 
Sioce fee 0 0 10) 0 0 10) 0 400 
Teme Su: 0 0 0 0 0 0 0 0 
AT ee eae 400 10) (0) 0 10) 0 10) 400 
7h eee Neae 100 800 0 0 800 0 10) 10) 
PATS mena 100 100 0 0 100 0 0 100 
Se ape cats 40 0 0 0 10) 10) 0 40 
is enone 400 10) 0 0 10) 0 10) 1,200 
MO Rr saee At, 400 40 200 0 240 0 10) 400 
DG rea reerens 800 0 400 10) 400 0 10) 1,200 
Dron nhete a 1,200 0 10) 0 0 0 (0) 0 
Oe Ae 8,400 0 800 0 800 0 0 0 
ING yee eee 5,600 0 800 0 800 0 0 800 
Dearth: 14,400 0 2,400 (0) 2,400 800 0 4,800 
SO tered 12 ,000 (0) 0 (0) 0 0 
Gerereic ne 22,400 (0) 5,600 0 5,600 10) (0) 800 
Leica a: e2 3,000 0 500 10) 500 0 0 0 
PX OE ied pee 5,500 0 0 0 10) (0) 0 500 
OA ine ae ea 32 , 000 0 0 0 10} 0 10) 1,600 
Aer 500 10) 0 0 0 10) 0 500 
Tee 0 0 0 (0) 0 (0) 0 500 
WS rxeta aor 500 | (6) 0 0 0 0 0 540 
Dainese 2 4,500 | 0 0 0 10) (0) 0 500 
Teepe | 0 0 0 0 0 0 0 2,000 
Saarcneee | 120 0 0 0 10) 0 0 2,000 
DS iat tts 1,200 10) (0) 0 0 10) 0 1,000 
DOE nk aie 2,400 0 10) 0 0 0 10) 2,000 
DOL ON ON a 1,500 0 10) 0 0 0 0 500 
Oe eees 860) 0 0 100 100 0 0 0 
LS eee eae ae 10,600 0 0 600 600 10) 0 10) 
PA 0S APS aoe 1,800 | 0 0 40 40 10) 10) 0 
PAT eat aie 100 | 0 0 240 240 80 0 15621 
| eta 
Average...... 25,974 | 18 206 244 468 56 4 1,685 
