505 
Quiver LAKE, Sept. 30 To OcTosper 12, 1914. Botrom Fauna 
17 CoLLEcTIons, DepTH, 1 TO 6 FT. 
(Most in vegetation) 
Number per square yard; Pounds per acre 
Campeloma subsolidum 24.7 74.1 
Lioplax subcarinatus 11.1 13.3 
85.1 329.7 
Vivipara contectoides 48.2 241.0 
Pleurocera sp. Li LS 
Amnicola emarginata 2.3 1.5 
Amnicola limosa 8.2 0.4 
Valvata spp. 9.4 0.5 
Physa, small ; 7.6 124.0 1.7 33.4 
Young Unionidae 6.3 2.6 
Musculium transversum 2.0 6.0 
Pisidium sp. 18.2 0.7 
Chironomid larvae, large red 257 get! 
Chironomid larvae, small 31.7 4.4 
Palpomyia larvae 5.5 0.3 
Caddis larvae 0.5 trace 
Hexagenia nymph 0.5 ; 0.4 
Agrionid nymph 1.1 127.9 0.5 25.2 
Large libellulid nymph 1.6 4.0 
Small leeches 34.1 5.7 
Large leeches 3.5 7.0 
Small Oligochaeta 11.7 0.4 
Hyalella knickerbockeri 36.0 1.4 
Total 337.0 388.3 
Quiver Lake, Aug. 30, 1915. Borrom Fauna 
3 CoLLECTIONS,* DEPTH, 7 To 10 rt. No VEGETATION 
Number per square yard} Pounds per acre 
Vivipara contectoides | 160 160 800 800 
Small leeches 8.6 : 1.4 
Caddis larvae 6.0 26.2 0.6 3.1 
Asellus sp. 11.6 A Keak 
| 
Total | 186.2 803.1 
* All opposite Bishop’s. 
