. The life of inland waters; an elementary text book of fresh-water biology for American students. Freshwater biology. Decapoda 191 what larger size, that live sprawling in the mud of the bottom in trashy pools. Their long legs and hairy- bodies are thickly covered with silt. Two pairs of thoracic legs are adapted for grasping and five pairs for walking, and the appendages of the middle abdominal segments are modified to serve for respiration. Asellus feeds on water-cress and on other soft plants, living and dead, are found in the bottom ooze. It reproduces rapidly, and, in spite of cannibal h
. The life of inland waters; an elementary text book of fresh-water biology for American students. Freshwater biology. Decapoda 191 what larger size, that live sprawling in the mud of the bottom in trashy pools. Their long legs and hairy- bodies are thickly covered with silt. Two pairs of thoracic legs are adapted for grasping and five pairs for walking, and the appendages of the middle abdominal segments are modified to serve for respiration. Asellus feeds on water-cress and on other soft plants, living and dead, are found in the bottom ooze. It reproduces rapidly, and, in spite of cannibal habits when Fig. 98. Three common Amphipods. A, Gammarus fasciatus; B, Eucrangonyx gracilis; C, Hyalella knickerbockeri. (Photo, by G. E. Embody). often becomes exceedingly abundant. An adtdt female of Asellus communis produces about sixty eggs at a time and carries them in a broodpouch underneath her broad thorax dining their incubation. There is a new brood about every five or six weeks during the early summer season. Both this order and the preceding have blind representatives that live in unlighted cave waters, and pale half-colored species that live in wells. The crawfishes are the commonest inland representa- tives of the order Decapoda. These have the thoracic. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Needham, James G. (James George), 1868-1956; Lloyd, John Thomas, 1884- joint author. Ithaca,N. Y. , The Comstock Publishing Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1915
