. Cuvier's animal kingdom : arranged according to its organization. Animals. 412 CRUSTACEA. THE FIRST FAMILY* OF DECAPOD A,— Decapoda Brachyura {KleiatagnatTta^ Fabricius),— Has the tail (or post-abdomen) shorter than the thorax, without appendages or swimmerets at its extremity, and in a state of rest folded beneath the breast, and lodged in a sternal cavity. It is triangular in the males, but rounded and swollen in the femalesf, and is furnished in the former with four or two appendages at the base [on the inside], whilst in the female it has four pair of double filaments employed in carrjan
. Cuvier's animal kingdom : arranged according to its organization. Animals. 412 CRUSTACEA. THE FIRST FAMILY* OF DECAPOD A,— Decapoda Brachyura {KleiatagnatTta^ Fabricius),— Has the tail (or post-abdomen) shorter than the thorax, without appendages or swimmerets at its extremity, and in a state of rest folded beneath the breast, and lodged in a sternal cavity. It is triangular in the males, but rounded and swollen in the femalesf, and is furnished in the former with four or two appendages at the base [on the inside], whilst in the female it has four pair of double filaments employed in carrjang the eggs, and which are analogous to the swimming sub-abdominal appendages of the Macrura. The antennae are small ; the intermediate pair, generally lodged in a cavity beneath the fore-margin of the carapax, are terminated by two very short [articulated] filaments. The peduncles of the eyes are larger than in the Macrura. The first pair of legs is terminated by a claw. The branchiae are arranged in a single row in the form of ««Af«naMCoramon small Edible Crab), upper side and under Pyramidal platCS, COmpOSCd of a great num- Bide of the body, with the limbs truncated.—fi, lateral antenna; b, inter- -l i^ - j. -x a ^ i .1 mediate antenna : c, eye; rf, outer foot jaw; e,/,fi-, A, base of the five pairs D^r 01 mmUtC leaflets Spread One UpOn the of legs; A, tail; ;, Bternum. _ .i /- ^ • t -i ^ «*i ^ijg loot-jaws are ordmarily shorter. other and broader than in the Decapods, the outer pair forming a kind of labium* This family may be regarded as constituting the single genus Cancer,— Comprising the numerous species of crabs [and consisting of a portion only of the Linnaean genus Cancer, divisible into seven sections and a gi*eat number of minor divisions, regarded by recent authors as genera]. Of these the majority have the legs attached at the sides of the breast, and always ex- posed. The species thus characterized constitute the first five sections, Pi
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Keywords: ., bookcentury1800, bookdecade1840, bookpublishe, booksubjectanimals
