3. PEKIN TO COPPERAS CREEK DAM 
14 CHANNEL CoLLEcTIONS, JuLy 22, 23, 28, anp Ave. 19, 1915 
483 
PEKIN TO CopPpERAS CREEK DAM 
Number per square yard 
Pounds per acre 
Campeloma subsolidum 
Lioplax subcarinatus 
Vivipara subpurpurea 
Pleurocera sp. 
Musculium transversum 
Young Unionidae 
Leeches (small spp.) 
Hydropsyche sp. (larva) 
17.1 51.3 
2.6 3.1 
28.8 73.3 
2.1 10.5 
7.0 8.4 
126.7 63.3 
126.9 63.7 
0.2 0.4 
42.0 7.1 
Chironomid larvae (small spp.) 6.4 49.8 0.8 ud 
1.4 0.2 
205.5 145.1 
Total 
9 CoLLECTIONS, 4- To 7-FT. ZONE, JULY 22, 23, ann Ave. 19, 1915 
PEKIN TO COPPERAS CREEK DAM 
= = 
Number per square yard| Pounds per acre 
Campeloma subsolidum 95.3 285.9 
Lioplax subcarinatus 8.8 10.5 
177.6 638.0 
Vivipara contectoides 66.7 333.5 
Pleurocera sp. 6.8 8.1 
Musculium transversum 102.6 51.3 
Young Unionidae 0.1 104.0 0.2 52.4 
Planorbis trivolvis 163: 0.9 
Leeches (small spp.) 23.8 4.0 
Chironomid larvae (small spp.) 4.0 34.4 0.5 bill 
Caddis larvae (small spp.) 6.6 0.6 
Total 316.0 695.5 
