. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. 508 ABACHXIDA. eleven segments and no jointed anal filament. Ph. reui/ormis Latr., in BraziL Thelyplionus Latr. The chelicerae are short and end in a chela, their masti- cating blades fuse in the middle line. The elongated twelve-ringed abdomen with segmented anal filament. T. caudntiix Fabr., in Java. Order 6.—Scorpionidea* (Scorpions). Aracfmida with chelate chelicerce, and elongated, pediform chelate pedipalqyi, with a prce-abdomen composed of seven segments, and an elongated post-ahdomen of six
. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. 508 ABACHXIDA. eleven segments and no jointed anal filament. Ph. reui/ormis Latr., in BraziL Thelyplionus Latr. The chelicerae are short and end in a chela, their masti- cating blades fuse in the middle line. The elongated twelve-ringed abdomen with segmented anal filament. T. caudntiix Fabr., in Java. Order 6.—Scorpionidea* (Scorpions). Aracfmida with chelate chelicerce, and elongated, pediform chelate pedipalqyi, with a prce-abdomen composed of seven segments, and an elongated post-ahdomen of six segments, with poison spine at the hind end; with four pairs of lungs. The Scorpions have a cer- tain resemblance to the De- capod Crustacea in their poAverf ul chelate pedipalpi and firm armour (fig. 410). The stout cephalo-thorax is joined to an elongated abdomen, which is divided into a cylin- drical prse-abdomen, composed of seven segments, and a very narrow six-segmented post- abdomen, which is curved dorsahvards. The post-abdo- men ends Avith a curved poison spine, which is provided with two poison glands. The cheli- cerae are three-jointed and chelate; the pedipalpi end with a swollen terminal chela, while the basal joint serves with its broad grinding surface as a jaw. The four pairs of legs are strongly de- veloped and end Avith double claws. In their internal organization the Scorpions reach the highest * P. Gervais, " Eemarques sur la famillc dcs Scorpions et description de plusieurs especcs nouvelles, ; Arch, du ihk.^ci' (rhi-st. nat., IV. Newport, " On the structure, relations, and development of the nervous and circulatory- Systems in Jlyriapoda and macrourous Ai-achnida," Phil. 'Trans. 1848. L. Dufour, " Histoire anatomique et physiologique des ; Mini, pres a Vacad. des sciences, 1856. E. Metschnikoff, " Embryologic des Scor- pions," Zeitschr fiir ;!S., Zool., F:o. 410.—Cephalo-thorax a
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanimals, bookyear1892
