. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 202 QUADRUMANA. four-footed Mammalia. The same analogy with these appears in the disposition of the lumbar vertebras. Their number is six or seven, and their articular or oblique processes are bifurcated, and give origin to a styloid process, which serves to increase the strength of the lumbar part of the vertebral column, and is therefore to be found in the greater number of the quadrupeds, There is no true sacrum ; but two or three sacral vertebrae, forming a conical series, are separately united to the iliac bones, in
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 202 QUADRUMANA. four-footed Mammalia. The same analogy with these appears in the disposition of the lumbar vertebras. Their number is six or seven, and their articular or oblique processes are bifurcated, and give origin to a styloid process, which serves to increase the strength of the lumbar part of the vertebral column, and is therefore to be found in the greater number of the quadrupeds, There is no true sacrum ; but two or three sacral vertebrae, forming a conical series, are separately united to the iliac bones, in the same manner as in the Carnivora. The pelvis is much more elongated and cylindrical than in the Chimpanzee, and consequently more approximate to the type of the quadrupeds. The iliac bones are very long, but narrow, with a posterior concave, and an anterior convex surface. The pubic symphysis is very long; the ischiatic tuberosities are curved outwards, broad, and form a semicircular surface for the insertion of the ischial callo- sities, which serve the Mandrills as a secure and commodious seat, when they are disposed to sleep or repose after the violent and fa- tiguing motions which they habitually exe- cute. By all these peculiarities it is manifest that the Mandrill is much more remote from man than the Chimpanzee, and a superficial examination of the two skeletons (figs. 121 and 122) will be sufficient to show the great differ- ence existing between them. Between these two extremes are ranged the other genera of Monkeys of the Old World, as I have stated in the above-mentioned book. I take the liberty to refer to it for more details, and principally for the gradual deviation, by which the vertebral column of the Chimpanzee passes, by the intermediate forms of the Orang- cetan, the Gibbons, the Scmnopitheci, the Inui, to that of the Cynocephali; but I think it necessary to make an exception for the Sia- mang, because the anthropo-morpJwus disposi- tion is more distinct
Size: 929px × 2689px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, booksubjectanatomy, booksubjectphysiology, booksubjectzoology
