. An introduction to the study of mammals living and extinct. Mammals. 3IO UNGULATA 2. The horns of the Bovidce consist of permanent, conical, usually curved bony processes, into which air-cells continued from the frontal sinuses often extend, called "horn- cores," ensheathed in a case of true horn, an epider- mic development of fibrous struc- ture, which grows CO ntinuously, though slowly, from the base, and wears away at the apex, but is very rarely shed entire. The only existing species in which the latter process occurs regularly and periodically is the American Prong-Buck {Antil
. An introduction to the study of mammals living and extinct. Mammals. 3IO UNGULATA 2. The horns of the Bovidce consist of permanent, conical, usually curved bony processes, into which air-cells continued from the frontal sinuses often extend, called "horn- cores," ensheathed in a case of true horn, an epider- mic development of fibrous struc- ture, which grows CO ntinuously, though slowly, from the base, and wears away at the apex, but is very rarely shed entire. The only existing species in which the latter process occurs regularly and periodically is the American Prong-Buck {Antiloaipra), in which the horns also differ from those of all others in being bifurc- ated. Horns are not present at birth, but begin to grow very soon afterwards. The -Head of Antelope (ffazeZiffi/ranM), showing horns. From malo= oil o^Jc*. Sir V. Broolte, Proo. Zoo!. Soc. 1878, p. 724. males Ot all exist-. FlG. ing .Boj'if^fE possess them, and they are also present (though usually not so fully developed) in the females of all except the genera Bosdaphus, Strepsiceros, Tragelaphus, Antilope, Mpyc&ros, Saiga, Cohiis, Cenicapra Felea, , Neoiragus, Cephalophus, and Tetraceros; as well as in some species of Gazella, such as G. pidicaudata and G. walleri Another character by which different members of the Pecora can be distinguished among themselves is derivedfrom the nature of themolar teeth. Although there is nothing in the general mode and arrange- ment of the enamel-folds, or in the accessory columns, absolutely distinctive between the two principal families, existing species may. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Flower, William Henry, 1831-1899; Lydekker, Richard, 1849-1915. London, A. and C. Black
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