. The anatomy of the domestic animals. Veterinary anatomy. 62 THE SKELETON OF THE HORSE and presents a deep central depression and two shallower lateral ones which adapt it to the surface of tiie cerebellum. The parietal border (Marcro parietalis) is united by suture with the parietal and interparietal. The mastoid border (Margo luastoideus) joins the petro- mastoid part of the temjioral bone. The basilar part is connected by cartilage (in the young subject) with the bod}' of the sphenoid. The condyles articulate with the atlas. Development.—The occipital bone ossifies in cartilage frmii four
. The anatomy of the domestic animals. Veterinary anatomy. 62 THE SKELETON OF THE HORSE and presents a deep central depression and two shallower lateral ones which adapt it to the surface of tiie cerebellum. The parietal border (Marcro parietalis) is united by suture with the parietal and interparietal. The mastoid border (Margo luastoideus) joins the petro- mastoid part of the temjioral bone. The basilar part is connected by cartilage (in the young subject) with the bod}' of the sphenoid. The condyles articulate with the atlas. Development.—The occipital bone ossifies in cartilage frmii four centers, and consists at birth of four jjieces as described above. The lateral parts unite with tlie. 10 Fic. .30.—Crakium of New-uohn Fo.\l; Posterior View. .4, jB, C, Squamous, lateral, and basilar parts sf occipital bone; D, bone: E, parietal bone; F, squa- mous temporal bone; G, petro-mastoid part of temporal bone; 1, external occipital protuberance; 2, 2, depressions in which complexus tendons are attached; 3, sutural (preinterparietal?) bone: 4, supraorbital process; .5, zygomatic process of temporal bone: 6, postglenoid process: 7, posterior process of squamous temporal bone: 8, mastoid process; 9. paramastoid process; 10, occipital condyle; 11, arrow in foramen magnum. basilar part at three to four months, and with tli(^ scjuama in the second year, when the bone is consolidated. The parieto-occipital suture and the spheno-occipital synchondrosis are ob- literated about the fifth year usually. The occipito-mastoid suture partially ossifies in old suljjects. The Sphenoid Bone The sphenoid bone (Os sphenoidale) is situated in the base of the cranium, its central part lying in front of the basilar part of the occipital. It consists of the body, two pairs of wings, and two pterygoid processes. The body (Corpus) is situated medially; it is cylindrical, but flattened dorso- ventrally, and wider in front than liehind. Its ventral surface (Facies externa) is c
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectveterinaryanatomy
