The animal kingdom, arranged after its organization : forming a natural history of animals, and an introduction to comparative anatomy . orynchus Phalangiom. ( [Professor Bell and De Haan have described many new and curious genera belonging to the section Trigona :the former, in the second volume of the Transactions of the Zoological Society ; and the latter, in his work uponthe Crustacea of Japan.] The sixth section, Cryptopoda, is composed of a few species remarkal)le for having the legs,except the anterior pair, concealed, when folded up, beneath the dilated lateral margin of the ca
The animal kingdom, arranged after its organization : forming a natural history of animals, and an introduction to comparative anatomy . orynchus Phalangiom. ( [Professor Bell and De Haan have described many new and curious genera belonging to the section Trigona :the former, in the second volume of the Transactions of the Zoological Society ; and the latter, in his work uponthe Crustacea of Japan.] The sixth section, Cryptopoda, is composed of a few species remarkal)le for having the legs,except the anterior pair, concealed, when folded up, beneath the dilated lateral margin of the carapax,which is nearly either semicircular or triangular; the upper edge of the claws is compressed, andformed like a cocks comb. The species are exotic, and compose the two genera Calappa, Fabr., andMthra, Leach. In the shape of their claws they resemble some of the Arcuata and Pinnipedes, such asHepatus, Mursia, &c.; so that this section shoidd be placed higher in the series. The same may alsobe said with respect to the species of the following section, some of which approach the Arcuata, andothers the Orbiculata and 416 CRUSTACEA. The seventh and last section, the Notopoda, is formed of Crabs having the four or two posteriorlen-s inserted above the plane of the others, and seeming to be dorsal, and directed upwards. In thosewhere they are not terminated by a sharp hook, the animal generally uses them to retain in its holdvarious marine productions, such as the valves of shells, sea-weeds, &c., with which it covers tail has seven joints in both sexes; the majority have the abdomen bent beneath the breast, andthe legs terminated by a short hook, and unfitted for swimming. Homola, Leacli, have the carapax nearly square ; the aiitennee long ; the ocular peduncles long-; the claws ofthe males larg-er than the females, and the posterior pair of legs directed upwards. The outer foot-jaws are longand exposed [as in the Macrura]. The type, H. spinifrons. Leach, is
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Keywords: ., bookcentury1800, bookdecade1840, booksubjecta, booksubjectzoology
