. The animal kingdom : arranged after its organization; forming a natural history of animals, and an introduction to comparative anatomy. Zoology. 412 Div. 3. ARTICULATA—CRUSTACEA. Class 1. THE FIRST FAMILY* OF DECAPODA,— Decapoda Brachyura {Kleistagnathay Fabriclus),— Has the tail (or post-ahdomen) 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 feraalesf, and is furnished in the former with four or two appendages at the ba
. The animal kingdom : arranged after its organization; forming a natural history of animals, and an introduction to comparative anatomy. Zoology. 412 Div. 3. ARTICULATA—CRUSTACEA. Class 1. THE FIRST FAMILY* OF DECAPODA,— Decapoda Brachyura {Kleistagnathay Fabriclus),— Has the tail (or post-ahdomen) 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 feraalesf, 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 carrying the eggs, and which are analogous to the swimming sub-abdominal appendages of the Macrura. Tiie 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 iu a single row in the form of pyramidal plates, composed of a great num- ber of minute leaflets spread one upon the other : the foot-jaws are ordinarily shortei. Y\^.\.—Carcinus Manm (Common small KdibleCrnb), upper side mid nndtrr ?idc of the body, with the limbs truncated.—«, lateral niitenna; 6, inter- niediaie Hiitcii(i:i; c, eye ; d, outer loot jjiw ; e,/, g^ h, base of the five pairs of legs ; k, tail; I, sternum. and broader than in the Decapods, the outer pak 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 Linnasan genus Cancer, divisil)le into seven sections and a great 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
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Keywords: ., bookauthorwe, bookcentury1800, bookdecade1860, booksubjectzoology
