498 
THompson Lake, AuG. 12—20, 1914. Borrom Fauna 
3 SanD-BoTToM COLLECTIONS,* DreptH, 1 To 5 FT. 
(Some vegetation) 
Number per square yard 
Pounds per acre 
Campeloma subsolidum 46.6 139.8 
Lioplax subcarinatus 23.3 121.5 27.9 425.7 
Vivipara contectoides 51.6 258.0 - 
Valvata spp. 96.6 5.3 
Musculium transversum 55.0 301.6 27.5 38.8 
Pisidium sp. 150.0 6.0 
Chironomid larvae (large spp.) 10.0 6.7 
Small leeches 18.3 3.1 
Caddis larvae 26.6 2.6 
103.1 22.4 
Caenis nymphs 3.3 0.2 
Large libellulid (nymphs) 3.3 8.2 
Hyalella knickerbockeri 41.6 1.6 
Total 526.2 486.9 
* All above cut-road. These three collections, arranged separately here, are 
also included in tables preceding. 
THomepson LAr, Ava. 28, 1915. 
8 CoLLECTIONS,* DEPTH, 7 TO 9 FT. 
Number per square yard 
Bottom Fauna 
No VEGETATION 
Pounds per acre 
Campeloma subsolidum 23.0 69.0 
Lioplax subcarinatus 11.2 100.5 13.4 413.9 
Vivipara contectoides 66. 331.5 
Valvata spp. 54.7 3.0 
Musculium transversum 106.5 b3i2 
372.7 64.6 
M. jayanum trace 
Pisidium sp. 211.5 8.4 
Small leeches 27.0 4.5 
Small Oligochaeta 1.2 trace 
48.7 18.1 
Chironomid larvae (large spp.) 20.3 13.6 
Caddis larvae 0.2 trace 
Total 521.9 496.6 
* All above ‘‘cut-road.” 
