. A junior course of practical zoology. Zoology. 376 SKELETON OF THE FOWL each other only by the thin interorbital septum; (4) the lower jaw is connected with the squamosal by a movably articulated bone, the quadrate, which probably corresponds to either the incus or the malleus of the rabbit; (5) there is only a single auditory ossicle, the columella ; (6) there are no teeth. The fowl's skull may be readily divided into cranial and facial portions which are loosely connected together, and capable of slight movement upon each other. The cranial portion consists of the cranium proper, or brain-
. A junior course of practical zoology. Zoology. 376 SKELETON OF THE FOWL each other only by the thin interorbital septum; (4) the lower jaw is connected with the squamosal by a movably articulated bone, the quadrate, which probably corresponds to either the incus or the malleus of the rabbit; (5) there is only a single auditory ossicle, the columella ; (6) there are no teeth. The fowl's skull may be readily divided into cranial and facial portions which are loosely connected together, and capable of slight movement upon each other. The cranial portion consists of the cranium proper, or brain-case, and the auditory capsules : the facial part is formed by the jaws and the olfactory QJ B Q J D Fig. 66.—Gallua bankiva. The skull from the right side. (a. m. m.) A, articular surface of the mandible. AT, anterior tympanic recess, lead- ing to Eustachian tube. B, pterygoid. C, occipital condyle. D, palatine. E, rostrum. F, mandibular foramen. PO, fenestra ovalis. FR, fenestra rotunda. FZ, zygomatic process of frontal bone. G, supra-angular. H, dentary. IS, inter-orbital septum. J, jugal. L, lacrymal. M, maxilla, MP, maxillo-palatine process of maxilla. K", nasal. OF, optic foramen. PM, premaxilla. PT, posterior tympanic recess, Q, cLuadrate. Q J", quad- rato-jugal. SF, olfactory foramen. SZ, zygomatic process of squamosal, TF, foramen for fiftli nerye. 1. The cranial portion of the skuU is a somewhat conical box of bone, the base of which forms the hinder end of the skull, the apex being directed forwards. In the young skull the outlines of the component bones. 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 Marshall, A. Milnes (Arthur Milnes), 1852-1893; Hurst, C. Herbert (Charles Herbert), 1856?-1898, joint author. London, Smith, Elder
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1888
