. The animal kingdom : arranged after its organization; forming a natural history of animals, and an introduction to comparative anatomy. Zoology. Ordkr 2. THYSANOURA. 487 THE FIRST FAMILY OF THE THYSANOURA,— LepismenvE, Latr., Has the antennae like threads, and divided, from the base, into a great number of minute joints; palpi very distinct and exposed; the abdomen furnished on each side, beneath, with a row of moveable appendages, like false legs, and terminated by articulated setae, of which three are more remarkable; and the body is clothed with minute, shining scales. It composes the sin
. The animal kingdom : arranged after its organization; forming a natural history of animals, and an introduction to comparative anatomy. Zoology. Ordkr 2. THYSANOURA. 487 THE FIRST FAMILY OF THE THYSANOURA,— LepismenvE, Latr., Has the antennae like threads, and divided, from the base, into a great number of minute joints; palpi very distinct and exposed; the abdomen furnished on each side, beneath, with a row of moveable appendages, like false legs, and terminated by articulated setae, of which three are more remarkable; and the body is clothed with minute, shining scales. It composes the single genus Lepisma, Linn.,— ^\^^ich has the body elongated, and covered with small scales, silvery and shining, whence the most common species has been compared to a small fish. The antennae are setaceous, and often very long. The mouth is composed of a labrum, two nearly membranous mandibles, two maxillae, with two divi- sions, having a 5 or 6-jointed palpus, and a labium with four divisions, bearing two 4-jointed palpi. The thorax is composed of three segments. The abdomen, which is gradually narrowed towards its posterior extremity, has, at the sides, a row of small appendages arising from a short joint, and termi- nated in setose points : the posterior are the longest. A kind of scaly style, compressed, and formed of two pieces, arises from the anus; then follow three articulated setae, which extend beyond the body. The legs are short, with the coxae often very large, and strongly compressed and scale-like. Many species hide themselves in the crevices of sashes which remain closed, or are but rarely opened, under damp boards, in wardrobes, &c. Others lie hidden under stones. Machilis, Latr. (Petrobiiis, Leacli), has the eyes very much facetted, nearly contiguous, and occupying^ nearly all the head; the body convex, arched above; the abdomen terminated by small threads fitted for leaping, the middle one placed above the other two, being much longer than them. They lea
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Keywords: ., bookauthorwe, bookcentury1800, bookdecade1860, booksubjectzoology
