. Cuvier's animal kingdom : arranged according to its organization. Animals. DECAPODA. 417 Tribe A [Jsc/iizopoda, Westw.].—Those which, in the proportions, forms, and uses of the feet, the anterior, or at least the second, pair being cheliferous, and which carrying their eggs beneath their tails, approach the Brachyura, and which are ordinarily known under the names of Lobsters, Cray- fish, Prawns, and Shrimps. Divisible into four sections:—1. Anomala; 2. Locusta;; 3. Astacini; 4. Carides. Tribe B \_Schi:opoda, Latr.].—Those which have the legs slender and filamentous, accompanied by an extern
. Cuvier's animal kingdom : arranged according to its organization. Animals. DECAPODA. 417 Tribe A [Jsc/iizopoda, Westw.].—Those which, in the proportions, forms, and uses of the feet, the anterior, or at least the second, pair being cheliferous, and which carrying their eggs beneath their tails, approach the Brachyura, and which are ordinarily known under the names of Lobsters, Cray- fish, Prawns, and Shrimps. Divisible into four sections:—1. Anomala; 2. Locusta;; 3. Astacini; 4. Carides. Tribe B \_Schi:opoda, Latr.].—Those which have the legs slender and filamentous, accompanied by an external articulated branch as long as the limbs, which thus aj)pear doubled in number ; fitted for swimming, and not cheliferous, the eggs being carried beneath them, and not under the tail. [Opossum Shrimps.]* The first section [of the tribe Aschizopoda], or the Anomala.—The two or four hind legs are always much smaller than the preceding. The under side of the tail never presents more than four pairs of appendages, or false The lateral swimming-pieces at the extremity of the tail, or the parts which represent them, are thrown back at its sides, so as not to form with the terminal segment a fan-like swimmeret. The ocular peduncles are generally longer than those of the Macroura of the following sections. [Two subsections, Hippides and Paguriens.] The subsection Hippides (Latr.) has all the upper teguments of the body soUd. The two fore-legs cither terminate in a monodactyle or fingerless hand, like a plate, or they terminate in a point. The six or four following legs terminate in a swimming-plate. The two terminal legs are filiform, folded back, and situated at the lower base of the tail, which is suddenly narrowed after the first segment, which is short and broad, and of which the last is in the form of a long triangle. The lateral appen- dages of the penultimate segment are in the form of bent swimming-plates. The sub-abdominal appendages are four pairs, and formed
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