615 
TABLE XIV.—Concluded. 
RELATIVE NUMBER OF PLANKTON?TS IN ILLINOIS RIVER AND SPOON RIVER. 
ROTATORIA | ENTOMOSTRACA |vseor ARV MISCELLANEOUS OTAL SPECI TOTAL PLANKTONTS 
Date 2 2 ae ee 2 ae 
° Ss ° c & ° = ° Ss ° i= 
‘3 § a eS a Sele A g 
= a i = a = a = a = a 
iad n - = nn - n = nn al n 
18 VIII 361,680] 2,72 
‘ 
25 VIIL| 185,720 765 1,520 2 388,120] 34, 704 
16 «IX 45,5921 3, 60d 2, 607 19 600,005) 14,520 
30 IX 48, 642 96 2,400 | 1,480) 85 20 | 977, 434) 20, 080 
u4 x 131,600, 3,560 4640] “2 | 2 2,173, 440| 20, 920 
2 5a) |e eee Te Se OLE ST peril Fae [acon apart ieee! 33 "| 30, 680 
17 XI] 172,800 2, 80 5, 360 2, aay 63| 20] 5,408,460, 17, 880 
Sain 86,7 8 1, 665 |.......- | 56| 12] 1,252/579| 9, 820 
28 X11} 100,340 2 520 130 42] 9 362,720] 1,360 
Average) 141, 634 1, 561] 2,854 | Gos] 77 | 24] 2,892,085] 20,492 
1897 
3 IT] 10,460 5 AK DAOH||:. 5. 44) 10 293,080} 1, 720 
2 IT 26,200] 2, 88 6,400 | 5,280] 45) 16 450,280, 52, 800 
2 ITI 47,180) 20, 000, 2,080 [19,200 Si} 11] 1,498,200} 423, 200 
27 ~—«-IV || 1,276, 000 34, 80) 4,000 [28, 67 | 20 || 358,278) 080] 591. 600 
95  _V | 2,287,160] 217, 400) 10,240 | 2,500) 90] 36 | 91,362, 440) 3, 460, 600 
38 VI| 351,900} 27, 900 : 33 |) 14,968, 406] 136, 7 
33 3, 667, 220) 93, 400 
32 3, 782, 800) 1, 418, 000 
u 
= 
< 
_ 
I 
- 
¥ 
aa 
iw 
Ss 
a 
a 
== 
11 TX | 1,744,250) 2, 362, 400 49) 4,832, 640/11, 467, 600 
Depaul . 900) 1, 072, 800 29 239, 660) 2, 061, 000 
30 XI} 109,840) 1,965, 600 19 520, 165) 2, 113, 900 
040 00 5 | 13 160, 760) 1, 258, 800 
082) 93,918] 3.987) 85 | 703) 11,757 | 4,898] 67 | 25) 40,004, 478) 1, 923, 277 
| } 
1898 
25 I} 126,603 2,600} 4,788 7,661 | 5,000) 7. 18 | 
2 IT 48, 649) $00) _3,285)......--. 3,285] 2 35 9 
29 III] 115,880) 17,920] 22,180 1,940 | 720) 100} 31 
10 V | 2,663,400] 24, 480 13, 200 7 | 40 
7 _VIj 903,000 2, 900 23, 600 |. 67! 31 
VII | 153, 000 8, 400, 5, 040 9% | 23 
5 VILL | 1,294, 240 61, 200] 3, 360 |. si} 41 
12 =IX! 197,960 oe 2,420 89| 20 
4 Xf] 105,020 2, 2,700 79| 24 
2 XI] 156,300 9, 4, 360 | 75| 241 1,275,380) 53,300 
6 XII 64, 280 ie 680 |.......) 40] 17] 2,043,090] 24, 800 
Average} 529, 848) 14, 6, 204 98 7 25) 41,071,067) 263, 560 
"1899 
3 I 47| 18 309,280 16, 840 
” Tt 29] 6 318,022} 10, $00 
IE ; | 47} 6) 1,121,980] 52, 000 
Average| 87,490| 2,507) 1,772) 2ia)......|_ 200........]...... “| 10 583, 094) 26,547 
Grand Av...) 465,067| _238,828| 63,983 2,255 104 | 616] 6,805 | 2,430, 69 | 24 | 28,283,205) 750,429 
Ratio... 1.9 1 in| Pele ala Mella sal> Gopal ck 38 1 
