. The comparative anatomy of the domesticated animals. Veterinary anatomy. 780 THE CLNTBAL AXIS OF THE NERVOUS SYSTEM. flattened above and below, and comprised at their internal borders between the corpora restiformia and the inferior face of the lateral lobes of the cerebellum, to which they are strongly adherent by their superior face. These two plexuses are joined by means of Renault's valve, which is united to them towards its base. Sulci and lobules of the cerebellum.—On examining, in a general manner, all the sulci which intersect the external surface of the cerebellum, we see that they
. The comparative anatomy of the domesticated animals. Veterinary anatomy. 780 THE CLNTBAL AXIS OF THE NERVOUS SYSTEM. flattened above and below, and comprised at their internal borders between the corpora restiformia and the inferior face of the lateral lobes of the cerebellum, to which they are strongly adherent by their superior face. These two plexuses are joined by means of Renault's valve, which is united to them towards its base. Sulci and lobules of the cerebellum.—On examining, in a general manner, all the sulci which intersect the external surface of the cerebellum, we see that they penetrate to very unequal depths in the substance of the organ, and that they Fig. MEDIAN AND VERTICAI, SECTION OF THE BRAIN. 1, Section of the medulla oblongata; 2, ditto of the pons Varolii; ditto of the crura cerebri; 4, ditto of the cerebellum, showing the arbor vita; 5, posterior ventricle covered by the cerebellum ; 6, aqueduct of Sylvius; 7, section of the valve of Vieussens (the figure and the line proceeding from it are too much forward) ; 8, natis ; 9, internal extremity of the hippocampus ; 10, section of the pineal gland (it is as voluminous as it was in the specimen from which this drawing was taken) ; 11, great vena Galeni, proceeding from the velum interpositum and choroid plexus, 12 ; 13, middle ventricle; 14, foramen of Monro; 15, common posterior foramen; 16, grey com- missure; 17, anterior white commissure; 18, section of the corpus albicans; 19, ditto of the pituitary gland; 20, interior of the pituitary stem communicating with the middle ventricle; 21, section of the optic chiasma; 22, ditto of the fornix; 23, ditto of the corpus callosum; 24, septum lucidura; 25, cerebral convolutions; 26, olfactory lobule. divide it into successively decreasing segments, of which Figs. 429 and 482 may furnish a sufficient idea. There is at first a certain number of principal lobules, which are divided into secondary lobules ; and these, again, are in their turn se
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