. Evolution and its relation to religious thought . Fig. 46.—Reptile-brain, a, side view ; b, top view. same serial arrangement, of the same parts, only that thecerebrum has now become the dominant part instead ofthe optic lobes. In the average bird (Fig. 47) the cere-brum has grown so large that it extends backward, andpartly covers the optic lobes. In the lower mammals(marsupials), the brain is much the same in this respect, PROOFS FROM EMBRYOLOGY. 145 as in birds—i. e., the cerebrum only partly covers theoptic lobes, so that, looked at from above, the whole se-. FiG. 47,—Bird-brain, a, side

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. Evolution and its relation to religious thought . Fig. 46.—Reptile-brain, a, side view ; b, top view. same serial arrangement, of the same parts, only that thecerebrum has now become the dominant part instead ofthe optic lobes. In the average bird (Fig. 47) the cere-brum has grown so large that it extends backward, andpartly covers the optic lobes. In the lower mammals(marsupials), the brain is much the same in this respect, PROOFS FROM EMBRYOLOGY. 145 as in birds—i. e., the cerebrum only partly covers theoptic lobes, so that, looked at from above, the whole se-. FiG. 47,—Bird-brain, a, side view • b, top view. ries of ganglia are still visible. But in the average mam-mal (Fig. 48) the cerebrum is so enlarged that it covers A B Fig. 48.— Mammal-brain, a, top view ; b, side view., entirely the optic lobes and encroaches on the cerebellumbehind and the olfactive lobes in front. In some mon-keys, indeed, the cerebellum is nearly or even quitecovered. Finally, in man (Fig. 49), the cerebrum has

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Keywords: ., bookauthorlecontej, bookcentury1800, bookdecade1880, bookyear1888