. The animans and man; an elementary textbook of zoology and human physiology. The galley-worms (Julus) (fig. 64), large, black-ish, cylindrical millipeds found under stones and logsand leaves and in loose soil, are familiar forms. Theycrawl slowly and when disturbed curl up and emit a mal- odorous fluid. They can easily bekept alive in shallow glass vesselswith a layer of earth in the bottom,and their habits and life-history maythus be studied. They should befed sliced apples, green leaves, grass,strawberries, fresh ears of corn, are not poisonous and maybe handled with impunity. The
. The animans and man; an elementary textbook of zoology and human physiology. The galley-worms (Julus) (fig. 64), large, black-ish, cylindrical millipeds found under stones and logsand leaves and in loose soil, are familiar forms. Theycrawl slowly and when disturbed curl up and emit a mal- odorous fluid. They can easily bekept alive in shallow glass vesselswith a layer of earth in the bottom,and their habits and life-history maythus be studied. They should befed sliced apples, green leaves, grass,strawberries, fresh ears of corn, are not poisonous and maybe handled with impunity. They laytheir eggs in little spherical cells ornests in the ground. An Englishspecies of which the life-history hasbeen studied lays from 60 to 100eggs at a time. The eggs of thisspecies hatch in about twelve lithobians and centipeds areflattened and have but a single pairof legs on each body-ring. They arepredaceous in habit, catching andkilling insects, snails, earthworms,etc. They can run rapidly, andFIG. 66. A centiped, Scolo- have the first pair of legs modified. pendra sp. (Natural -^ a pajr of poison-claws, which are bent forward so as to lie near the mouth. The common skein centiped (Scutigera for-ceps) (fig. 65) is yellowish and has fifteen pairs oflegs, long 4o-segmented antennae, and nine large andsix smaller dorsal segmental plates. The true centipeds(Scolopendra) (fig. 66) have twenty-one to twenty-threebody-rings, each with a pair of legs, and the antennae have ARTHROPODS AND MOLLUSCS 157 seventeen to twenty joints. They live in warm regions,some growing to be very large, as long as twelve inches ormore. The bite or wound made by the poison-claws isfatal to insects and other small animals, their prey, andpainful or even dangerous to man. The popular notionthat a centiped stings with all of its feet is is recorded by Humboldt that centipeds are eaten bysome of the South American Indians. Insects (class Insecta).—Insects are the most familiaran
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Keywords: ., bookcentury1900, bookd, booksubjectphysiology, booksubjectzoology
