144 Wisconsin Academy of Sciences, Arts, and Letters. 
Table 1.—Continued. 
Organism 
Lake Winnebago 
Lake Butte 
des Morts 
Fox 
River, 
Omro 
cS 
CPo 
a 
Oo 
a 
05 
-OO 
Is 
a 
So 
•1 a 
a? ^ 
bO i 
a 
-■53 
c^oSo' 
"S’? 
.2 
1 
id 
> 
a 
eo 
o 
Associated animals 
10.75 
7.51 
4.08 
39.19 
33. GO 
2.66 
Hirudinea . 
54.66 
37.86 
3.86 
19.74 
46.79 
50.39 
28.75 
16.97 
Oligochaeia . 
37.59 
66.66 
137.18 
7.37 
546.65 
39.68 
49.41 
78.39 
Nematoda . 
1.33 
10.45 
7.73 
1.91 
2.66 
Cladocera . 
.66 
5.19 
15.42 
2.44 
60.53 
Decapoda . 
10.93 
7.82 
Ostracoda . 
16.39 
1.28 
1.33 
3.73 
Amphipoda . 
280.99 
351.56 
214.46 
264.15 
1,468.87 
32.30 
303.72 
1,717.47 
1.64 
Isopoda . 
2.57 
.93 
182.59 
4.44 
1.33 
90.12 
1.30 
Epkemerida . 
3.42 
23.15 
7.37 
31.01 
8.04 
15.64 
1.30 
3.28 
Odonata (nymphs )... . 
.66 
17.24 
5.24 
1.24 
1.30 
Neuroptera (lar.) .... 
4.93 
1.33 
Hemiptera . 
19.10 
6.53 
163.27 
7.37 
61.99 
2.66 
10.62 
32.66 
Trichoptera (lar.) . 
53.95 
99.32 
41.50 
29.59 
107.50 
41.06 
22.53 
50.97 
1.64 
Lepidoptera (lar.) . 
1.28 
2.44 
8.08 
.66 
8.13 
11.73 
Diptera (lar.) . 
287.12 
466.62 
306.23 
375.25 
1,100.95 
222.86 
155.09 
1,105.75 
1.64 
Coleoptera . 
18.44 
32.66 
.93 
14.79 
40.61 
5.37 
5.59 
43.10 
Acarina . 
4.08 
1.28 
14.58 
17.24 
25.28 
1.33 
3.73 
2.61 
Table 2. Average number of individuals per square meter on bottoms of 
Lake Winnebago and Oneida Lake. 
Winnebago 
Oneida 
MoUusca 
Associated 
Animals 
MoUusca 
Associated 
Animals 
Boulder... 
201.75 
119.36 
344.85 
1,150.10 
Gravel. 
449.28 
1,129.22 
899.91 
1,043.89 
Sand. 
397.73 
927.90 
1,650.50 
1,770.93 
Mud (and clay). 
495.95 
953.79 
2,657.51 
3,208.11 
Vegetation. 
833.69 
3,566.31 
213.75 
49.77 
Average. 
472.84 
1,553.62 
1,153.21 
1,464.29 
