Bulletin of the United States Fish Commission Volume 11 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1893 edition. Excerpt: ...number of Allorchestes dentata, many examples of Pisidium, a Physa, a few annelids (Oligoch ta), and a single leech (Nephelis 1-striata) not taken by us before. The Gammarus was feeding very freely on dead and decaying vegetation and filamentous algw, with some fresh vegetable fragments and a little pine pollen. No traces of animal food occurred in two specimens dissected, one half-grown and the other of the largest size. From the swampy tract on the eastern side of the lake already meutioned collections were made by hauliug a surface net iu the open water, by searching dead leaves, and by washing off the lily pads (Xuphar) in the net. These waters were swarming with lile, chielly insect larv;e and crustaceans. They apparently contained relatively few mollusks, several specimens of a large Phyna, a few Pixidium and one Amnicola occurring in our collections. The insect larva-included Agrion, Eplienu-ru, Chironomux, Goriiia, Hydrophil un, and Corethra. The only ainphipod crustacean was Allorchestes dentata, represented by but few examples, but the open water contained a great quantity of Dnphnia angulifera and an occasional Sida crystallina. Among the lily pads the same Daplinia occurred, together with a great number of eiula, a few examples of Cyclop and Diaptomi, and several of Daphnclla and of Polyphemux petJiculu.8 (young and adult), and a single short, dark cyprid. Leeches and their capsules were frequent, the usual spot ted and striate species (Nephelix mticulata and 7.-t-siriata). A single specimen of Clepnine cli'i/aiis and another Clvpainc not determined were also noticed. The capsule's of these leeches were common on the leaves of water-plants. Among less conspicuous objects, small Hydrachniil, ...