. The brain from ape to man; a contribution to the study of the evolution and development of the human brain. Brain; Evolution; Pongidae. 32 THE LOWER PRIMATES the rhinal fissure on the lateral aspect, and a sHght further protrusion down- ward of the tip of the temporal lobe. No actual distinction of an occipital lobe can be made upon the lateral surface although the markings on the mesial 4^k^, tf. Courtesy, American Museum oj Natural History FIGS. 12 AND 13. HAND AND FOOT OF LEMUR POTTO. Left. Palmar surface of liand showing rudimfntary development of index linger, palmar creases and opposab
. The brain from ape to man; a contribution to the study of the evolution and development of the human brain. Brain; Evolution; Pongidae. 32 THE LOWER PRIMATES the rhinal fissure on the lateral aspect, and a sHght further protrusion down- ward of the tip of the temporal lobe. No actual distinction of an occipital lobe can be made upon the lateral surface although the markings on the mesial 4^k^, tf. Courtesy, American Museum oj Natural History FIGS. 12 AND 13. HAND AND FOOT OF LEMUR POTTO. Left. Palmar surface of liand showing rudimfntary development of index linger, palmar creases and opposable thumb. Right. Plantar surface of foot showing rudimentary second toe and opposable hallux. surface show that this specialization of the neopallium has already begun to make definite expansions toward the occipital pole of the hemisphere. On the orbital surface of the brain the two orbital concavities are fairly well marked. This surface has a general obliquity outward, which increases the prominence of this concavity and permits the orbital plane to pass over into the frontal surface without sharp angulation in the region of transition. The interorbital keels are well marked. The olfactory bulb is large and detachable for a certain distance, although the olfactory tract is short and not detachable. The latter shows its greatest development in its lateral roots. 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 Tilney, Frederick, 1875-1938; Riley, Henry Alsop, 1887-. New York, P. B. Hoeber, inc.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbrain, booksubjectevo
