. Bulletin. Flag Lake, Oct. 6, 1914, in Potamogeto>, CJ;ratophylluii, and AlgaeWeed Fauna, Upper 9 Inches (Depth, 4 ft.) No. per sq. yard Pounds per acre Amnicola limosaPhysa (small spp.)Valvata spp. 13,125750375 Small libellulid nymphsAgrionid nymphs Chironomld larvae (small spp.)Hyalella knickerbockeri 375 450 7506,000 WSSr* • 21,825 1, 515 Foot of Thompson Lake, Middle, Aug. 14, 1914, in Potamogeton pectinatusWeed Fauna, Upper 9 Inches (Depth, ft.) No. per sq. yard Pounds per acre Amnicola limosaPhysa (small spp.)Valvata spp. 6,000
. Bulletin. Flag Lake, Oct. 6, 1914, in Potamogeto>, CJ;ratophylluii, and AlgaeWeed Fauna, Upper 9 Inches (Depth, 4 ft.) No. per sq. yard Pounds per acre Amnicola limosaPhysa (small spp.)Valvata spp. 13,125750375 Small libellulid nymphsAgrionid nymphs Chironomld larvae (small spp.)Hyalella knickerbockeri 375 450 7506,000 WSSr* • 21,825 1, 515 Foot of Thompson Lake, Middle, Aug. 14, 1914, in Potamogeton pectinatusWeed Fauna, Upper 9 Inches (Depth, ft.) No. per sq. yard Pounds per acre Amnicola limosaPhysa (small spp.)Valvata spp. 6,000960720 Pelocoris femoratusAgrionid nymphsCaenis sp., nymphsChironomld larvae (small spp.)Hyalella knickerbockeri 60 480 480 600 2,400 11,700 1, IV. Bottom and Weed Fauna, Littoral Zone of Glacial Lakesof Northeastern Illinois, 1916 1. Bottom Fauna Deep Lake. August—October, 1916. Bottom Fauna 7 Collections, Littoral Zone, 1 to 7 ft. Some Vegetation. Leeches, small spp. Chironomid larvae (small spp.) Caenis nymphs Hexagenia, etc. (nymphs) Caddis larvae (on Chara) Sand-case caddis larvae Libellulid nymphs Agrionid nymphs 28,1 Gomphid nymphs Pelocoris femorata . Hyalella knickerbockeri Asellus sp. Total 1, 516 Cedar Lake, August—October, 1916. Bottom Fauna24 Collections, Littoral Zone, 1 to 7 ft. Some Vegetation Number per square yard Pounds per acre Sphaerium striatinum Musculium transversum Pisidium spp. Amnicolidae Valvatidae Physa spp. Planorbis . Unlonidae, young Oligochaeta (small spp.) Chlronomid larvae (small spp.) pv, Palpomyia larvae 0.^ Polycentropus larvae trace Sand-case caddis larvae Caddis larvae (on Chara) Misc. caddis larvae Hexagenia, etc.
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
