. The animal kingdom, arranged after its organization, forming a natural history of animals, and an introduction to comparative anatomy. Zoology. 412 CRUSTACEA. THE FIRST FAMILY* OF DECAPODA,— Decapoda Brachyura (Kleistagnatha, Fabricius),— Has the tail (or post-abdomen) shorter than the thorax, without appendages or swirnmerets 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 *£i::::^^^N V^Q^>' ,'. ^J^y\Y ^x
. The animal kingdom, arranged after its organization, forming a natural history of animals, and an introduction to comparative anatomy. Zoology. 412 CRUSTACEA. THE FIRST FAMILY* OF DECAPODA,— Decapoda Brachyura (Kleistagnatha, Fabricius),— Has the tail (or post-abdomen) shorter than the thorax, without appendages or swirnmerets 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 *£i::::^^^N V^Q^>' ,'. ^J^y\Y ^xi^' tne ^ase fon tne 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. 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 pyramidal plates, composed of a great num- ber of minute leaflets spread one upon the other : the foot-jaws are ordinarily shorter 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 Linnacan genus Cancer, divisible 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 thus characterized constitute the first five sections, Pinnipedes, Arcuata, Quadri- latera, Orbiculata, and Fiff. 1.—Otrcinus Manas (Common small Edible Crab), upper side and under side of the body, with the limbs truncated.—u, lateral antenna;
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectzoology, bookyear1854
