The animal kingdom : arranged after its organization, forming a natural history of animals, and an introduction to comparative anatomy . .ind Cyclopida. 3. Pliyllopoda, including the Gymnnta (Branchipus), and As- piduphora (Apus). 4. Cinipedia, including the Lepadea and Baiaiiodn. 5. Precilopoda, including only Xiphosura. 1. Thoracostraca {Podopthalma, Leach], divided into two Muborders, Dccnpoda and Arthrostraca {Edrioplltalrna, Leach), divided into nine niinoi De Haan, in his magnificent worlt upon the Crustacea of Japan,adopting the quinnriau circular system of MLeay, divides
The animal kingdom : arranged after its organization, forming a natural history of animals, and an introduction to comparative anatomy . .ind Cyclopida. 3. Pliyllopoda, including the Gymnnta (Branchipus), and As- piduphora (Apus). 4. Cinipedia, including the Lepadea and Baiaiiodn. 5. Precilopoda, including only Xiphosura. 1. Thoracostraca {Podopthalma, Leach], divided into two Muborders, Dccnpoda and Arthrostraca {Edrioplltalrna, Leach), divided into nine niinoi De Haan, in his magnificent worlt upon the Crustacea of Japan,adopting the quinnriau circular system of MLeay, divides the classinto five orders,—, Tetradecapoda(£driopMfifma,Leach), Lophyropodn, and Phyllnpoda. M. Duverney has, within thelast few months, submitted a Memoir to the Academie des Sciences atParis, proposing a new classification uf the Crustacea according to tlicorgans of respiration, dividing the class into three principal groups,NudibranchitE, Cryptobranchie, and Lamellibrancbite ; hut the adop-tion of this, like any other single character, has had the effect ofbreaking the must natural relations.] BiVBTa^i; vS. /^. ff-- DECAPODA. 411 The lateral edges of the carapax are bent downwards in order to cover and defend thebrancliia;, an aperture being left iu front of the sliell for the passage of the water.* Thebranehiic are situated at the base of the four exterior foot-jaws and t)f the legs, tlie fouranterior being smallest. The six foot-jaws are of a different form, apphed to the mouth anddivided into two branehcs, the exterior rescmbhng a small antenna, furnislied at the tij) witha short multiarticulate piece [and the interior com|)osed of several joints, the two beinggreatly dilated in the crabs], the base being also furnished w ith a long pilose tendinous anterior pau of legs, and sometimes the two or four following, form large claws, tliepenultimate joint being dilated, with its lower extremity prolonge
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Keywords: ., bookauthorwe, bookcentury1800, bookdecade1840, booksubjectanimals
