Archive image from page 497 of Cuvier's animal kingdom arranged. Cuvier's animal kingdom : arranged according to its organization cuviersanimalkin00cuvi Year: 1840 486 INSECTA. Fig. 45.âa, Lithobius forcipatus ; b, Gi longicornis y have only fifteen pairs of feet; and their body, when seen from above, exhibits fewer segments than when seen fi-om beneath. Scutigera, Lamarck {Cermatia, Illiger), forming a genus very distinct from the rest of this family, has the body covered by eight shield-Uke plates, beneath each of which M. de Serres has observed two pneumatic sacs, or vesi- cular trache
Archive image from page 497 of Cuvier's animal kingdom arranged. Cuvier's animal kingdom : arranged according to its organization cuviersanimalkin00cuvi Year: 1840 486 INSECTA. Fig. 45.âa, Lithobius forcipatus ; b, Gi longicornis y have only fifteen pairs of feet; and their body, when seen from above, exhibits fewer segments than when seen fi-om beneath. Scutigera, Lamarck {Cermatia, Illiger), forming a genus very distinct from the rest of this family, has the body covered by eight shield-Uke plates, beneath each of which M. de Serres has observed two pneumatic sacs, or vesi- cular tracheae, communicating with tubular, lateral, and inferior tracheae. The under side of the body is divided into fifteen semi-segments, each bearing a pair of legs terminated by a very long, slender, and multiarticulated tarsus : the hind pairs are very long. Tlie eyes are large and facetted. They form the passage from the preceding family to the present. They are very active, and often lose some of their legs when touched. The French species (ScoZoj»e«dre à vingt-huit pattes, Geoff.,âS. coleoptrata, Panzer?) hides itself under the beams and joists of the wood-work of houses. S. longicornis, Fabr., and other species. Lithobius, Leach, has the spiracles lateral ; the body di- vided, both above and below, into the same number of seg- ments, each of which bears a pair of legs ; and the dorsal plates are alternately longer and shorter. Scolopendra forci- pata, Linn., and others described by Fabricius, Panzer, and Leach (Zool. Miscel. vol. iii.) The others have at least twenty-one pairs of feet, and the segments are of equal size and number, both above and beneath. Scolopendra proper, Linn. Those species which have only twenty-one pairs of feet, after the two hooks forming the lower lip and the antennae, and have seventeen joints, form Leach's genera Scolo- pendra and Cri/ptops. In the former, comprising the largest species, the eyes are distinct, eight in number, four on each si
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