DocrisH LAKE, AuG. 18, 1914. 
501 
Bottom Fauna 
3 CoLLEcTIONS, DEPTH, 6.5 To 7 FT. No VEGETATION 
Number per square yard 
Pounds per acre 
Vivipara contectoides 1.6 1.6 8.0 8.0 
Musculium transversum 3.3 1.6 
Pisidium sp. 33.3 41.6 1.3 3.1 
Valvata spp. 5.0 0.2 
Leeches (small spp.) 16.6 0.9 
186.6 12.3 
Chironomid larvae (large spp.) 170.0 11.4 
Total 229.8 23.4 
DocrisH LAKE, Auc. 18, 1914. Borrom Fauna 
5 COLLECTIONS, DEPTH, 2 TO 6 FT. 
ALL IN VEGETATION 
Vivipara contectoides 
Number per square yard 
Pounds per acre 
Pisidium sp. 
Valvata spp. 
Amnicola limosa 
Caddis larvae 
Total 
66.0 330.0 
: 68.0 336.0 
Campeloma subsolidum 2.0 6.0 
Musculium transversum 10.0 5.0 
128.0 ball 
160.0 302.0 8.8 19.1 
2.0 0.1 
Planorbis, small sp. 2.0 0.1 
Leeches (small spp.) 12.0 2.0 
Chironomid larvae (large spp.) 40.0 26.8 
Chironomid larvae (small spp.) 20.0 82.0 2.8 42.4 
Small libellulid nymphs 2.0 10.0 
8.0 0.8 
452.0 397.5 
