. Fresh-water biology. Freshwater biology. MM. 248 (i) Body and feet not covered by shell. Feet subcylindrical or flattened, jointed, prehensile. . Section B. Gymnomera . 249 No fornices. Rami of antennae 3- to 4-joiuted. Feet, 4 to 6 pairs, jointed, prehensile. 249 (250) Four pairs of feet, stout, compressed, with claw-Kke spines and branchial appendages. Tribe I. Onychopoda. Sole family. Polyphemidae Baird. Body very short. Shell converted into large globular brood-sac. Caudal process long, slender, with 2 long caudal stylets or setae. Rami of antennae with 3 and 4 joints. Eye very large
. Fresh-water biology. Freshwater biology. MM. 248 (i) Body and feet not covered by shell. Feet subcylindrical or flattened, jointed, prehensile. . Section B. Gymnomera . 249 No fornices. Rami of antennae 3- to 4-joiuted. Feet, 4 to 6 pairs, jointed, prehensile. 249 (250) Four pairs of feet, stout, compressed, with claw-Kke spines and branchial appendages. Tribe I. Onychopoda. Sole family. Polyphemidae Baird. Body very short. Shell converted into large globular brood-sac. Caudal process long, slender, with 2 long caudal stylets or setae. Rami of antennae with 3 and 4 joints. Eye very large; no ocellus. Labrum large. Two small hepatic ceca. One genus Po/y^/jewMj O. F. Miiller 1785. Sole species Polyphemus pediculus (Linne) Brood-sac globular, with 20-2S young in full grown spedmens. Antennules very small, on ventral sur- face of head. Head large, filled in front by huge movable eye. Antennae with 7 setae on each ramus. Feet stout, with strong daws, and branchial ap- pendage; fourth pair, very small. Length, 9. meas- ured to back of brood-sac, to mm.; $, mm. Common in northern United States in lakes, pools, and marshes. FIG. 1169. Polyphemus pedio- 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 Ward, Henry Baldwin, 1865-1945; Whipple, George Chandler, 1866-1924. joint author. New York, John Wiley & sons, inc. ; [etc. ,etc. ]
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
