The animal kingdom, arranged after its organization : forming a natural history of animals, and an introduction to comparative anatomy . Crabs. The eggs are united in a elder Hermann says that they carry them beneath the belly; and he also believesthat these Arachnida are able to spin. The younger Hermann and Leach dividethem into— Chelifer proper, having the first segment of the thorax divided in two by a trans-verse impressed line; a style at the tip of the moveable finger of the chelicerae; ithas only two eyes. Phal. cancroides, Linn., commonly called the Book Scorpion, is found in
The animal kingdom, arranged after its organization : forming a natural history of animals, and an introduction to comparative anatomy . Crabs. The eggs are united in a elder Hermann says that they carry them beneath the belly; and he also believesthat these Arachnida are able to spin. The younger Hermann and Leach dividethem into— Chelifer proper, having the first segment of the thorax divided in two by a trans-verse impressed line; a style at the tip of the moveable finger of the chelicerae; ithas only two eyes. Phal. cancroides, Linn., commonly called the Book Scorpion, is found in herba-riums, old books, &c., where it feeds upon the minute insects which frequent such Lives under stones, the bark of trees, &, Leach, has the thorax without division ; the chelicerae without a style. It has also four the monograph of tScorpionidts of Leach (Zool. Miscetl. vol. iii.), and Dalmaus memoir on Copal Insects,where a species is described under the name of Eucarpus. [Some new species of this group are described andfigured by M. Theis, in Annales des Sci. Nat., Sept. 1832].. Fig. 34—Chelifer faseiatus. Scorpio cimicoides. THE SECOND FAMILY OF THE TRACHEAN ARACHNIDA,— The Pycnogonides,— Has the thorax composed of four segments, occupying nearly the whole length of the body, terminated at each extremity by a tubular article, of which the anterior (which is larger, and either simple or pro- I <io not believe this appctida^^e is peculiar to one sex. H H 2 4fi8 ARACHNIDA. vided with chelicerse and palpi, or one kind of these organs) constitutes the moutli.* Both sexes haveeight feet, fitted for running; but tlie females exhibit, besides, two false legs, situated near the anteriorpair, and only employed in carrying the eggs. These animals are marine, analogous either to Cyamusand Caprellaf, or to the Arachnida of the genus Phalangium, with which Linnaeus united them. Thebody is commonly linear, with very long legs, consisting
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