326 
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.) 














38 ‘$s 38 = gs 
8 5 ro, zR 
1898 BS 8 s 3 : 8 = Ss 3 & S 5 
Ls LS SoS Q ss 3 eS SS 
= =o SN qs S88 aS a6, ss 
=o ss | Sa | oh £3 36 Sh |) sae 
Q Q Q a z a x 6) 
Tan Adee... 100 100 0 0 0 593,420 0| 26,500 
Sao ae ek 400 200 0 0 0 197/100 0} 37,000 
ces Sa a 9,675 | 7,353 0 0 0 190,017 |13,545| 45,666 
Bebe Make 500 100 0 0 0 1,246,300| 1,600] 54,700 
ead bat 800 80 0 0 0 629/680 '800| 197,600 
aOR icy nae 9,200| 2,000 0 0 0 1,016,000| 4,400| 1647800 
Cyn aes 6,318 632 0 0 518,954 0| 50/544 
Mar. “faces: 4,000 800 400 0 0 1,773,360] 400] 46,400 
ee ee 2/800 800 40 0 0 492'920| 800) 54/800 
ee Sheree: 27600} 1,400 0 200 0 324,200} 200) 89/600 
TF ene 1/600 800 0} 2,000 0 267,800} 400] 22,000 
aC aan 200 0 0 400 0 241,420) 400| 10/200 
/ Gv aa 100 0 0 500 0 241,440 0| 3,100 
apie. me 1,000 800 0 100 0 1,342/500| 300] 2,400 
POAFOn Cae 1/600} 1,200 100 0 0 1/340/800 0} 13/200 
eet ee 3/200 0} 3,200 0 7,710,400 0} 993200 
May 3...... 22,400| 3,200 0 0 0| 17,404,800 0| 83,200 
Cee eae oe 30.400 0} 3,200 0 0} 18/260'800 6,400 
oT ta Semana 800 800 0 0| 21/654'400! 1,600 0 
een leah | 3,640 200 200 0 0 990/800 0 200 
orien eal 3/840 400 0 0 0 2,282,400 0 600 
‘fete’: aae at 9,600} 8&,000 200 0 0 7,800,000 0 0 
CES iui aah aes 5’600| 1,600 800 0 0 6,480,000 0 0 
cme eye 57600 800 0| 3,200 3,200) 12,010/400 0 0 
one ennai 14/400] 2,400 100 0 0 6/491/200 0} 9,600 
lyase 8,800} 2,000 160 0 0 495,640 0 0 
Oa ip eee hale 10/000} 2/400 800 400 400 3,900,920 0 400 
Ce ane | 12'800| 2/000 0} 2,000 2,000 721.640 0 400 
Reels Mecca 2'400 400 0} 14,400, 14,400 487.000 0 0 
iow. cee | 5,600 800 0| 17,600 17,600 4,474,400 0 0 
Se one ea 2’ 800 400 0| 781400) 78/400!) 69/000'200 0 0 
SOUP G ey a 8/000 g00| 3,200] 13,600] 13,600 253,600 0 0 
LO ES = ts 12’800| - 0| 2,400] 207800] 20,800 728,000 0} 1,600 
oF SUS | 6,400 800 800} 7,200 7/200 122/400 0 0 
Sepia cOnnneae 5,600 0 800} 4,800 4,800 120,001,640 0 800 
eT Meh coy 11/500 0 500 500 500 1/451/120 0} 9,000 
R20 Sapnese 8/500 500 | 0} 18,000| 18,000! 1,923°500 0| 2/500 
Oey eae! 25'600| 1,600} 1,600| 65,000] 65,600 851,400 0 0 
Oct ae 8,000 500 500 0 0 720,000 0 0 
i aie ees 2'500| 1,000 0 0 0 843,540 0} 3,500 
Coast ae 2'000|} 1,000 0 500 500 1,744.000| 500] 5,000 
map See 15/000 0 60 500 500 1'334,000| 500] 35,000 
Nove 122.04. 15,000} 1,000 60 0 0 985,560) 2,000) 31,000 
eyed GY i, ea 5’000| 2,000] 2,000 0 0 965,000 0| 22°000 
Se HSS ee 17/000| 27000 0 0 488/100! 1,000} 28/000 
Doe ee: 4g'00e | 8/000 400 0 0 750.640! 4,000} 108/000 
SOOO | 200 0 200 0 0 721.500 0| 47/500 
Dec. 6s... 4 0 0 0 0 0 720,580 40| 7,000 
ee pee 0 0 0 0 0 1,573,800} 100] 16,400 
S05 a 0 0 0 0 0 487/120 0) 16.600 
TD es 200 0 0 0 0 490'600| 200! 28,000 
Average...... 7,194} 1,158 368| 4,871 4,760| 15,812,346| 630] 26,546 


