. The animal kingdom, arranged after its organization, forming a natural history of animals, and an introduction to comparative anatomy. Zoology. .MAMMALIANS. 39. Fiff. 2. They have all the upper jaw fixed to the skuII, and the lower composed of two pieces only, articulated hy a projecting condyle to a fixed temporal bone; the neck consists of seven vertebra?, one single species excepted, which has nine*; the anterior ribs are attached in front, by cartilage, to a sternum formed of a certain number of pieces placed in a row; their fore-limb commences in a blade-bone, which is not articulated,
. The animal kingdom, arranged after its organization, forming a natural history of animals, and an introduction to comparative anatomy. Zoology. .MAMMALIANS. 39. Fiff. 2. They have all the upper jaw fixed to the skuII, and the lower composed of two pieces only, articulated hy a projecting condyle to a fixed temporal bone; the neck consists of seven vertebra?, one single species excepted, which has nine*; the anterior ribs are attached in front, by cartilage, to a sternum formed of a certain number of pieces placed in a row; their fore-limb commences in a blade-bone, which is not articulated, but merely suspended in the flesh, often resting on the sternum by means of an intermediate bone, called a clavicle. This extremity is continued by an arm, a fore-arm, and a hand, the last composed of two ranges of small bones, called a wrist or carpus, of another range of bones termed metacarpus, and of digits or fingers, each of which consists of two or three bones, named phalanges. Excepting the Cetacea, they have all the first part of the hinder extremity fixed to the spine, and forming a girdle or pelvis, which, in youth, consists of three pairs of bones,— the ilium, which is attached to the spine, the pubis, which forms the fore part of the girdle, and the ischium, which constitutes the hind part. At the point of union of these three bones is situate the cavity with which the thigh is articulated, to which, in its turn, is attached the leg, formed of two bones, the tibia and fibula : this extremity is terminated by the foot, which is composed of parts analogous to those of the hand, namely, a tarsus, metatarsus, and digits or toes. The head of mammalians is always articulated bv two condyles upon the atlas, or first vertebra. Their brain is composed of two hemispheres, united by a medullary layer termed the corpus callosum, containing two ventricles, and enveloping the four pairs of tuber- cles named the corpora striata, the thalami nervorum opticorum, or beds of the op
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectzoology, bookyear1854
