614 



TABLE XIV. 

 Relative Number of Planktonts in Illinois River and Spoon River. 





ALG^ 



DIATOMS 



rhizopoda 



MASTIGOPHORA 



INFUSORIA 



Date 



cfl 

 O 



a 



a 



o 

 o 

 a 

 GG 



CO 



'5 

 c 



M 



a 



o 

 o 



& 



CO 



o 



a 



o 



o 

 c 

 m 



CO 



o 



c 



a 

 o 

 o 

 a 



CO 



CO 

 



a 



id 



o 

 o 

 a, 



1896 

 18 VIII 

 25 VIII 

 16 IX 



83, 200 

 4,840 

 5,446 



10, 840 

 4,560 



6,080 



576 



1,200 



8, 896, 000 



1,025.200 



350, 489 



682, 200 



816, 400 



1, 064, 500 

 963, 916 

 165, 960 



11,280 



29, 376 

 3, 360 

 6,240 

 10,080 

 19, 200 

 480 

 7,200 



28, 800 

 18, 080 

 16, 850 

 14, 280 

 30, 400 



5,960 



768 



2,880 



8,160 



2, 640 



5, 280 



3, 360 



500 



480 



1, 508, 000 



110, 000 



75,845 



175, 000 



1, 111, 200 



S8, 800 

 179, 606 



64, 880 



3,360 

 960 



23, 800 

 11,200 

 40, 106 

 27, 672 

 65, 200 



3,540 

 192 

 240 



30 IX 





2,400 



14 X 

 29 X 



2,160 

 480 

 480 

 480 



480 

 480 

 480 

 240 

 120 



1, 200 

 1,920 



17 XI 



3 XII 



98 XII 



2,800 



396 



3,280 



25,200 

 873 

 120 



44, 000 

 10, 083 

 1,440 



7,200 

 480 

 240 











Average 



1897 

 3 II 



14, 420 



40 



1,495 



1,745,583 



231,900 



339, 480 



1,231.900 



328,414,320 



79, 827. 200 



1, 937, 600 



2,318,160 



847,3-0 



282,440 



148, 880 



90, 725 



65, 400 



9,688 

 240 



16, 825 



300 



10, 700 



2,240 



11, 520 



25, 760 



232, 600 



8,400 



19, 200 



118, 000 



3,900 



800 



16, 640 



3,336 



720 

 37, 440 

 105, 600 

 379, 200 

 40, 900 

 13, 200 

 1,200 



28, 800 

 2,400 



414, 166 



42,420 



46, 600 



172, 100 



27,987,400 



9, 029, 360 



148, 006 



439. 600 



408, 160 



1,624,800 



1,100 



11,100 



15,400 



680 



160 

 3,840 

 9,600 



27, 938 



3,400 

 18, 800 

 18, 240 



515, 920 



29, 600 



12, 186, 000 



27,600 



180, 000 

 12, 000 

 26, 500 



244, 420 

 45, 600 



1,935 



26 II 





2,880 



22 III 



2,700 



1,600 



68. 400 



49, 000 



74, 680 



166, 760 



406, 400 



28,980 



940 



1,200 





240, 000 

 102, 000 

 3, 048, 000 

 85, 200 

 54, 000 

 4,800 

 662, 400 

 744, 000 

 24, 000 

 36, 000 



19, 200 



27 IV 



"""'7,"500 



2,500 



3,800 



24, 000 



816, 000 



145, 000 



42, 000 



25 V 

 28 VI 



10 VIII 



26 VIII 



11 IX 

 2 XI 



30 XI 



43,20li 



3,700 



18, 000 



53, 000 



5, 030, 400 



33, 600 



116,400 



54, 000 



98, 400 

 1,300 



5,000 



249, 600 



55, 200 



4,900 



28 XII 



3,600 



19 200 









Avei-ag> 



1898 

 25 I 

 22 II 



66, 725 



387 

 3,159 



5,400 

 68,800 

 17, 200 

 50, 040 

 308, 040 

 57, 060 

 25,000 

 IS. 500 

 520 



85, 534 



34, 644, 610 



174, 901 



211,653 



132, 140 



314, 224, 400 



30,803,600 



3,772.000 

 360, 240 



1, 217, 000 

 837,200 

 981,000 

 251,250 



416, 920 



16, 800 



4,800 



27, 320 



1, 778, 400 



31, 200 



7, 200 

 50, 400 



8,400 

 37, 440 

 15,000 



9, 120 



37, 505 



66. 338 

 141, 524 



1,400 

 49, 800 

 23, 600 

 19, 360 

 16, 8110 

 28, 00(. 

 12,580 

 32, 060 



1,000 



50, 788 



19, 200 



21,600 



1,760 



14, 880 



21,600 



10,800 



14, 400 



22. 800 



4,840 



2,500 



480 



3,577,171 



22, 059 



22 ,',448 



324, 800 



84, 967, 600 



597, 000 



536, 800 



252, 400 



19,500 



265, 600 



5,500 



1, 708, 000 



447,158 

 2,400 



1, 109, 007 



190, 017 

 69. 498 

 42, 020 



129, 600 



1,516,000 



20, 440 



129, 600 



56, 640 



35, 900 



69, 060 



7, 620 



41, 473 



39, 000 

 14, 400 



29 in 



10 V 



7 VI 



5 VII 



5 VIII 

 12 IX 



4 X 

 2 XI 



6 XII 



6,240 

 2,400 

 18, 000 

 16,800 

 3,700 

 1,440 

 5,500 



640 



55, 680 



7,400 



51, 600 



112,800 



2,400 



16,800 



3,600 



4, 320 



18,880 



11,520 



63, 600 



108, 000 



3,600 



6,000 



1,440 



16, 800 



3, 480 









Average 



1899 

 3 I 



50, 373 

 20 



4,916 



32,087,762 



10, 300 

 66, 750 

 59, 120 



180, 553 

 3,840 



35, 678 



220 

 1,125 



3,200 



12,260 



960 



1,200 



38, 400 



8, 084, 246 



143, 020 

 117,000 

 899,200 



23, 422 



3,360 

 7,200 



206, 036 



108, 940 



6,000 



30, 820 



26, 065 

 1,920 



7 II 





1,200 



7 III 



140 





800 













53 



43, 539 





45, 390 

 23,031.820 



1,547 

 293, 788 



1,515 

 289, 637 



13, 520 

 23, 281 



386,40'; 

 3,921,328 



3,520 

 161, 149 



48, 586 

 468, 051 



1,040 



Grand At.... 



30, 513 



22, 999 



Ratio 



1.4 



1 



78 



1 



12 



1 



24 



1 



20 



1 



