. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. ENCEPHALON OF REPTILES. '291 functions of organic life. In the active state of the summer season, suoli mutilation is followed by death in one or two hours, rarely more.' In serpents, the cerebellum, fig. 188, c, ex])ands into a depressed semicircular lobe directed backward from the confluence of the restiform crura and overlapping tlie major part of the fourtli ventricle, which appears as a short median fissure. The optic lobes, ib. b, now expanded to the breadth of the cere- bellum, show both a longi- tudinal and a tra
. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. ENCEPHALON OF REPTILES. '291 functions of organic life. In the active state of the summer season, suoli mutilation is followed by death in one or two hours, rarely more.' In serpents, the cerebellum, fig. 188, c, ex])ands into a depressed semicircular lobe directed backward from the confluence of the restiform crura and overlapping tlie major part of the fourtli ventricle, which appears as a short median fissure. The optic lobes, ib. b, now expanded to the breadth of the cere- bellum, show both a longi- tudinal and a transverse fissure, the latter crossing near the hinder Ijorder, and giving to this j^art of the , brain a close resemblance â to its homoloijue the ' biffe- || minal bodies ' in Mammals. ' The optic lobes are hollow : the cerebral crura show sliijht enlargements, like optic thalami, anterior to the optic lobes, before ex- i:ianding into the hemi- spheres. These are pressed into close contact medially, and comjDOse a prosence- phalon nearly as broad as long, and double the breadth and length of the mesencephalon. The outer svirface of the hemisjiheres is smooth, composed of a thin layer of vascular or grey neurine. Into their cavity or ventricle a ' cor- pus striatum' projects from the under and outer side ; beneath or raesiad of which is a minor prominence. The septum, formed by the thin mesial wall of each hemisphere, is perforated for tlie passage of a ' clioroid plexus.' The ventricles are continued forward into the olfactory lobes, fig. 188, 1 ; each is marked off by an oblirpie fissure from the fore part of the hemisphere, which it equals in breadth; ' CCI. u 2. ll Nihls III B i( uslnit 1 I IV. 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 Owen, Richard, 1804-1892; Cornell University. College of Veteri
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