. Fourteen weeks in zoology. Zoology. CLASS VERMES: OEDEE NEMATELMINTHBS. 339 the alimentary canal of the hog. Its proboscis is retractile and is armed with four circlets of sharp, recurved spines sur- rounding a simple suctorial mouth. (Fig. 408.) Koleops is another genus found in the eel. ORDER NEMATELMINTHES. General Characteristics. — The Nematelminthes (thread-like worms) are parasitic during a portion of their lives in the interior of various animals. The head is without a circle of hooks and the sexes are separate. Gordiidae.—The Hair- snake is so called from the ^^' ^— „ erroneous noti
. Fourteen weeks in zoology. Zoology. CLASS VERMES: OEDEE NEMATELMINTHBS. 339 the alimentary canal of the hog. Its proboscis is retractile and is armed with four circlets of sharp, recurved spines sur- rounding a simple suctorial mouth. (Fig. 408.) Koleops is another genus found in the eel. ORDER NEMATELMINTHES. General Characteristics. — The Nematelminthes (thread-like worms) are parasitic during a portion of their lives in the interior of various animals. The head is without a circle of hooks and the sexes are separate. Gordiidae.—The Hair- snake is so called from the ^^' ^— „ erroneous notion that it'' originates from horse- hairs soaked in water. Probably, by the eggs being eaten, the larvs obtain access to the bodies of grasshoppers, etc., and, coiling up within the cavity, reach a length oftentimes tenfold that of their host. At maturity, they desert the insects at whose expense they have been nourished, and seek the water to lay their eggs and die. Fig. 1,10. GorcHus aguaHcus, Hair-snake, u. 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 Steele, Joel Dorman, 1836-1886. New York, Chicago [etc. ] A. S. Barnes & Company
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1872
