SANGAMON Bay, Sept. 8, 1915. 
503 
Bortom Fauna 
8 CoLttEecTIons, DeprH, 6.5 To 7.5 rt. No VEGETATION 
Number per square yard 
Pounds per acre 
Campeloma subsolidum 9.1 27.3 
Lioplax subcarinatus + 13.7 24.3 16.4 51.2 
Vivipara contectoides aa 7.5 
Musculium transversum 81.8 40.9 
91.0 41.4 
Valvata spp. 9.2 0.5 
Leeches (small spp.) 16.3 PA 
Chironomid larvae (large spp.) 15.6 10.4 
38.0 14.0 
Caddis larvae 5.6 0.5 
Hexagenia nymphs 0.5 0.4 
Total 153.3 106.6 
SancAamown Bay, Sept. 8, 1915. 
4 CoLLecTIoNS, DerTH, 1.5 To 6 FT. 
Borrom Fauna 
No VEGETATION 
Number per square yard 
Pounds per acre 
Campeloma subsolidum DoeT 107.1 
Lioplax subcarinatus 12.7 15.2 
54.9 145.3 
Vivipara contectoides 4.0 20.0 
Pleurocera sp. 2.5 3.0 
Musculium transversum 217.5 108.7 
232.5 109.5 
Valvata spp. 15.0 0.8 
Leeches (small) 27.0 4.5 
Chironomid larvae (large spp.) 3.7 2.4 
Palpomyia larvae 0.7 45.4 trace 10.2 
Caddis larvae 11.5 aaa 
Hexagenia, etc. (nymphs) 2.5 2.2 
Total 332.8 265.0 
