The animal kingdom, arranged after its organization : forming a natural history of animals, and an introduction to comparative anatomy . THE THIRD FAMILY OF THE TRACHEAN ARACHNIDA,— The Holetra (Hermann),— Has the thorax and abdomen united into a mass, beneath a common epidermis. The thorax is at most divided into two by a strangulation; and the abdomen merely presents, in some species, the traces of articulations, formed by foldings of the epidermis. The anterior extremity of the body is often ad- * The siphon of a larjre Phiiiichilns, brought from the Cape by I The palpi are thence those of
The animal kingdom, arranged after its organization : forming a natural history of animals, and an introduction to comparative anatomy . THE THIRD FAMILY OF THE TRACHEAN ARACHNIDA,— The Holetra (Hermann),— Has the thorax and abdomen united into a mass, beneath a common epidermis. The thorax is at most divided into two by a strangulation; and the abdomen merely presents, in some species, the traces of articulations, formed by foldings of the epidermis. The anterior extremity of the body is often ad- * The siphon of a larjre Phiiiichilns, brought from the Cape by I The palpi are thence those of the maxilla;.Delalande, exhibits longitudinal sutures, so that it appears to mo lo f According to Savigny, they form the between the Arach- consist of a , tongue, and two maxillae, all soldered together. I nida and Crustacea. I place them in this situation with doubt. TRACHEARIiE. 469. Fig. 37. vanced, in the form of a muzzle or beak. The majority have eight legs, the others six* This familyis composed of two tribes. The first tribe is that of the harvest-men, Phalangita, Latr., having the chelicers very apparent,either projecting in front of the trunk or being inferior, but always terminating in a didactyle forceps,preceded by one or two joints. They have two filiform palpi of five joints, the last terminated by asmall hook; two distinct eyes; two maxillae, formed by the prolongation of the basal joint of the palpi,and often four others, composed merely of the dilated coxae of the two anterior pairs of feet. The bodyis oval or rounded, covered, at least upon the thorax, by a more solid skin. The abdomen exhibits theappearance of foldings. The legs are long, always eight in number, and divided distinctly, in themanner of those of insects. Many {Phalangium) have, at the base of the two posterior feet, two spira-cles, one on each side, but bidden by the coxae. The maj
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Keywords: ., bookcentury1800, bookdecade1840, booksubjecta, booksubjectzoology
