Guide to the Crustacea, Arachnida, Onychophora and Myriopoda exhibited in the Department of Zoology, British Museum (Natural History) .. . gest andcommonest of the tropical Africanspecies of centipedes, and it isalso met with less frequently inthe more temperate parts of of the species belongingto this order are very widely dis-tributed, and two of them (Scolo-pendra morsitans and -S. suhspi-uipea), have been introduced, likethe common rat or cockroach, intomost of the seaport towns of theworld, but, unlike these animals,they are unable to maintain them-selves as far north as En
Guide to the Crustacea, Arachnida, Onychophora and Myriopoda exhibited in the Department of Zoology, British Museum (Natural History) .. . gest andcommonest of the tropical Africanspecies of centipedes, and it isalso met with less frequently inthe more temperate parts of of the species belongingto this order are very widely dis-tributed, and two of them (Scolo-pendra morsitans and -S. suhspi-uipea), have been introduced, likethe common rat or cockroach, intomost of the seaport towns of theworld, but, unlike these animals,they are unable to maintain them-selves as far north as order includes only a singleBritish member [Cryptopfi hor-tcnsis), which is not unconnnonin gardens. Order—Craterostigmo-morpha. The dorsal plates numbertwenty-one in this order, but thereare only fifteen pairs of legs, andthe stigmata are reduced in num-ber as in the Lithobiomorpha. There is only a single species {Cratciostigniiis (((sDicoiianiis),which occurs in Tasmania. Order Lithobiomorpha. Chilopoda in which the body is short and furnished with onlyfifteen pairs of legs, and six or seven pairs of stigmata arranged. Fig. morsitaiis (after Koch). 1-28 Guide to Rfvriopoda. Table-case approximately upon alternate segments, the terga without stigmataNo. 2S. Ijeing greatly reduced in size. The young, upon hatching, liave only seven pairs of legs, theremaining eight being added with successive moults. The Lithobiomorpha are swift-footed centipedes, which liveunder stones or fallen tree-trunks, and feed upon worms, insects,etc. They do not attain to any great size. There are about half-a-dozen British species of Lithohins ; perhaps the commonest of them isLiiliolriiis forficatjis. Sub-classANARTIOSTIGMA. The normal tracheal system isreplaced in the Anartiostigma by aseries of median dorsal pulmonarysacs, furnished with tubes dippinginto the pericardial space, and open-ing each by a single stigma whichresults from the upw^ard migrationand coalescence of
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectcrustacea, bookyear19
