. Elementary text-book of zoology. 392 CHORD AT A. laryngeal, a peculiar nerve which, on the right side, loops round the subclavian artery and, on the left side, passes round the ductus arteriosus. In each case it goes forwards beside the trachea to the larynx. The sympathetic can be followed as a ganglionated cord between the vagus and its depressor branch, and the spinal accessory and hypoglossal can also be recognised supplying certain of the neck-muscles. 280.—A Median Longitudinal Section through the Rabbit's Brain. (Mainly after Marshall.) Middle Commissure, Cerebral Hemisphere. Pineal B
. Elementary text-book of zoology. 392 CHORD AT A. laryngeal, a peculiar nerve which, on the right side, loops round the subclavian artery and, on the left side, passes round the ductus arteriosus. In each case it goes forwards beside the trachea to the larynx. The sympathetic can be followed as a ganglionated cord between the vagus and its depressor branch, and the spinal accessory and hypoglossal can also be recognised supplying certain of the neck-muscles. 280.—A Median Longitudinal Section through the Rabbit's Brain. (Mainly after Marshall.) Middle Commissure, Cerebral Hemisphere. Pineal Body. jellum. < ja^^^^^^m^^mr *^^^t^ f —- \ .MMa^B^^^^^^^w- -^iHK^ Corpus Fifth Ventriclt. ^Q,_^^^^^^ I x V Olfactory Fourth Ventricle. J!im^ga\ \ \ X Lobe. Infundibulum. Optic Nerve. \ Anterior Foramen of Munro. Commissure. The skeleton of the rabbit can be divided, as in preced- ing types, into axial and peripheral portions. It consists in the adult chiefly of bone and it presents the remarkable feature of epiphyses. An epiphysis is a cap of bone which, up to a certain age, can be detached from the main portion of the bone as it is united to it merely by cartilage. The meaning of these epiphyses will be pointed out later (see page 413). Skull—The skull has mainly persistent sutures. The characters of the teeth have already been noticed. The important mammalian features are the heterodont (incisors,. 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 Masterman, Arthur Thomas. Edinburgh, E. & S. Livingstone
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