. Animal biology. Zoology; Biology. 450 METAZOAN PHYLA animals are tailless, all assume a semi-erect position, and all have oppos- able thumbs and great toes. With the exception of the gorilla they are preeminently arboreal. As compared with man the anthropoid apes have stronger jaws and teeth; they have a relatively low cranial capacity; the structure of the mouth is not such as to admit of articulate speech; the arms are long and, together with the scapulas, or shoulder blades, are developed in accordance with their use as organs of locomotion in trees;. Fig. 346.—Male gorilla, Gorilla goril
. Animal biology. Zoology; Biology. 450 METAZOAN PHYLA animals are tailless, all assume a semi-erect position, and all have oppos- able thumbs and great toes. With the exception of the gorilla they are preeminently arboreal. As compared with man the anthropoid apes have stronger jaws and teeth; they have a relatively low cranial capacity; the structure of the mouth is not such as to admit of articulate speech; the arms are long and, together with the scapulas, or shoulder blades, are developed in accordance with their use as organs of locomotion in trees;. Fig. 346.—Male gorilla, Gorilla gorilla, reared in captivity. Gorillas are the most powerful of all the primates. They are chiefly terrestrial, usually quadrupedal, but able to stand erect. Their skin is black—the only " negro " ape. They inhabit heavily forested country of tropical West Africa; now protected in sanctuary by Belgian government. {Photographed by permission of Zoological Society of Philadelphia, by Hartman, from the Science News Letter, May 20, 1939.) the feet as well as the hands are grasping appendages; and they cannot assume a fully erect posture. The gibbons, the least manlike of the great apes, are strictly arboreal, whereas the gorillas, regarded as the most manlike in bodily form, are preeminently terrestrial in habit. From this it would appear that there has been a gradual tendency to change from arboreal life to life on the ground. A noteworthy characteristic of these apes is the specialization of the two pairs of limbs for entirely different modes of locomotion. The arms, adapted for grasping and for swinging from limb to limb, serve as locomotor organs in the trees, while the legs, though still showing. 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 Wolcott, Robert Henry, 1868-1934; University of Nebrask
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Keywords: ., bookcentury1900, bookcoll, booksubjectbiology, booksubjectzoology
