. Text book of zoology. Zoology. 230 AHhropoda. The Scolopendras, of whicli several species are luminous, are active and predaceous, killing tlieir food with the poison-claws. In temperate zones the few species are relatively small; they attain to an important size in the Tropics (to a foot long). In England, there are several species of Lithobius, and others. Order 2. Chilognatha or Diplopoda. Only two pairs of jaws, generally termed mandibles and maxillae, are present. The structure of the body is very peculiar: whilst the two legs of each pair arise far apart in the Chilopoda, separated by
. Text book of zoology. Zoology. 230 AHhropoda. The Scolopendras, of whicli several species are luminous, are active and predaceous, killing tlieir food with the poison-claws. In temperate zones the few species are relatively small; they attain to an important size in the Tropics (to a foot long). In England, there are several species of Lithobius, and others. Order 2. Chilognatha or Diplopoda. Only two pairs of jaws, generally termed mandibles and maxillae, are present. The structure of the body is very peculiar: whilst the two legs of each pair arise far apart in the Chilopoda, separated by a wide sternal plate, here they are articulated near to one another on the ventral side. Moreover, most segments bear two pairs of legs, indicating that each segment has really arisen by the fusion of two. The four segments following the head have not, however, more than one pair of legs each; indeed, one of them is altogether apodous. The shape of the segments varies : in some (Fig. 193 B) they are. Fig. 193. Transverse sections : 4 Of a Chilopod. B—D Of different Diplopoda (JB lulus, D Olomeris), P lateral outgrowth.—Orig. cylindrical; in others each segment is a compressed cylinder, but possesses a short lateral process, which gives the body a more flattened appearance (Fig. 193 G) ; in others, again, the body is itself flattened, convex dorsally and concave ventrally (Fig. 193 D). The legs, which are feeble and thin, are turned out; they are all essentially alike (excepting those which serve in the males as copulatory organs, see above). It has already been stated that the genital apertures are anterior and that copulatory limbs are present. The members of this order are sluggish animals, which live on decaying or soft vegetable matter or animal remains. When dis- turbed, they roll themselves together. Occurring in England are lulus, with an elongate, cylindrical body; and Glomeris, with short, semi-cylindrical body, composed of so few segments that it bears a superfici
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