. Brehm's Life of animals : a complete natural history for popular home instruction and for the use of schools. Mammalia. Mammals; Animal behavior. 412 THE ODD-TOED ANIMALS. consists of a mixture of wool and hair; its mane is short, erect and curly, and the hair of the tail also partakes of a crinkly, curly character. During the second year the hair becomes more lustrous, mane and tail grow longer and less inclined to kink. After this the age may be determined from the appear- ance of the incisor teeth with tolerable correctness. From eight to fourteen days after birth the two cen- tral teeth,
. Brehm's Life of animals : a complete natural history for popular home instruction and for the use of schools. Mammalia. Mammals; Animal behavior. 412 THE ODD-TOED ANIMALS. consists of a mixture of wool and hair; its mane is short, erect and curly, and the hair of the tail also partakes of a crinkly, curly character. During the second year the hair becomes more lustrous, mane and tail grow longer and less inclined to kink. After this the age may be determined from the appear- ance of the incisor teeth with tolerable correctness. From eight to fourteen days after birth the two cen- tral teeth, the so-called "nippers," make their ap- pearance ; two or three weeks later another breaks through at each side of the nippers. After five or six months the lateral incisors pierce the gum and then the colt has its full complement of milk-teeth. These are in course of time replaced by the permanent teeth. At the age of two and one-half years the "nippers" are shed and replaced by new teeth; a year later the next pair are supplanted, and after another year the outermost incisors are changed. Simultaneously with this last alteration the canines break through, and this indicates that the development of the ani- mal is completed. After the fifth year a person wishing to judge of the age of a Horse, looks at the hollows on the grinding surface of the teeth: black- brown marks of the size of a small pea. They be- gin to disappear in the lower jaw at the age of five or six years; in the middle incisors they are obliter- ated in the seventh year, in the canines in the eighth year; then the upper teeth are developed in like order of succession, until all the marks have van- ished by the eleventh or twelfth year. As age ad- vances the teeth also gradually assume a different shape; they become narrower as they grow older. Another physical change noticeable in the animal is the variation of its coat with the seasons. With the access of the warm weather, usually beginni
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecta, booksubjectmammals
