320 
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.) 
N = 
S 3 
z < 3s 
Ss o's =&8 
1898 ~ SS SS 
as as se 
ee) SS ~3 
os “3.8 Sz 
& 9 1S) 
Jans JUt.c see 122,484,100 0 0 
ol oe Wee ieee 36,086,000 (0) 0 
SONOS ste, 43,208,127 0 0 
epee ores 20,321,700 0 (0) 
So POe eae 5,461,600 (0) 0 
eda sy aan 18,039,600 0 10) 
sine ae eee 43,400,000 0 0 
Marin ot) ah 9,940,000 0 0 
RR SO rata hts ors 2,009 ,200 (0) 0 
a: wepl Otis 22,035,600 0 0 
ED DN ae 29,539,000 0 0 
St. 2G! eo sien 6,864,800 10) 0 
Naso Se 14,809,800 0 0 
pie, UDA Aor 27,662,900 0 0 
Co ge ON eee 38,507,900 10) 60,000 
bie cee mat ae 86,614,400 0 10,800,000 
Maye 2Sacicees 1,063 ,924,800 0 7,200,000 
cph SO Aiea nsnr 203,922,800 0 1,800,000 
phi etenrareeie 231,154,200 0 0 
SPD A Se ey, 120,175,000 0 1,800,000 
<3 (sees 29,293,200 ty) 
Mane> 7s ae cc 19,855,400 460,800 0 
SO MLA Sitins axone 43,112,400} 3,801,600 0 
Bh aia 218,131,200 432 ,000 0 
eat YA ee 185,098,240 86,400 0 
a) LOU Ni fae Slicer peace 42,053,200 72,000 0 
PRD nts Oe 45 ,923 ,600 14,400 0 
pL Snes, 294,724,520 0 0) 
Se eZ Olere eed: 120,850,000 0 0 
Ange Die Sis ckess 107,710,800 0 0 
S ea serrei 496 ,927 ,200 0 0 
MMO 3 SS 166,452,800 0 0 
a ee ee ade 128,830,460 0 0 
etter 3 OS yriens 95,423,200 0 0 
Sep tenk6, ssc 76,982,440 0 0 
eS ices 49,515,000 7,500 0 
oe BZ ON eae 63,144,000 0 0 
SS PQ Sie tee 45,854,000 218,400 0 
Oct» Leesa 48,193,000 251,000 1,800,000 
Sg sand) Sexe tts ees 15,129,540 486 ,000 0 
Spe Sree 17,367,000 25,000 0 
or LD Sveaaine 5,416,500 13,500 0 
INoVver glia snicees 25,325,500 2,000 
Pp DI Gis cree 14,564,000 (0) 3,600,000 
SOMNALS) Sect: 36,011,000 0 0 
ODN crn 23,494,000 0 0 
SILO eee 73,719,000 0 0 
DMECA NG a. ee 56,400,500 0 0 
Sod elotceretaee 148,740,000 (0) 1,800,000 
N20 ee 116,344,800 0 0 
wen PAD ot Gare 67,965,800 (0) (0) 
Average...... 95,852,602 112,896 555,000 
Dinobryon 
sertularia 
8,000 
1,806,400 
2,764,800 
16,153,600 
43/200 
3/600 
0 
(0) 
247,200 
69 ,600 
407 ,602 
sertularia 
angulatum 
Dinobryon 
var. 
oo o0o00o0o Cco000o CoCo 
35,040 
598/400 
0 
4,432,000 
0 
0 
0 
14,400 
0 
12,000 
172/800 
6,00 
ecoo 90000 C9000 CO0DGO COOCO coco 
101,358 
divergens 
Dinobryon 
sertularia 
var. 
oo 9eo0000 COCO Coco 
8,000 
1,555,200 
2,104,100 
39/648 000 
1,584,000 
18,000 
56,000 
16,000 
0 
47,040 
eooo ec0o000 C900 CO0OD CcCooOCoO CooSo 
866,083 
