. An introduction to the osteology of the mammalia . e third digit is the longest,the second and fourth somewhat shorter and nearly equal,the fifth considerably shorter, and the first still more bones are only developed below the metacarpophalangeal joint of the pollex. In the other PRIMATES, the manus is generally longer an 286 THE MANUS. [CHAP. narrower than in Man, and as a general rule the first digit orthumb is less developed and less freely movable. In thegenera Troglodytes and Simla, as in Man, the proximalsurface of the carpus articulates with the radius alone, in allothers
. An introduction to the osteology of the mammalia . e third digit is the longest,the second and fourth somewhat shorter and nearly equal,the fifth considerably shorter, and the first still more bones are only developed below the metacarpophalangeal joint of the pollex. In the other PRIMATES, the manus is generally longer an 286 THE MANUS. [CHAP. narrower than in Man, and as a general rule the first digit orthumb is less developed and less freely movable. In thegenera Troglodytes and Simla, as in Man, the proximalsurface of the carpus articulates with the radius alone, in allothers it articulates also with the ulna. The scaphoid andlunar bones are always distinct. An os centrale, (Gegen-baur, Fig. 92, ce) is present in all, except in the Gorilla andChimpanzee, and some of the Lemurs. Where it is wantingas an independent bone it probably has become fused with,and then forms part of, the scaphoid. The pisiform ispresent in all, and generally of a more elongated form, andmore salient than in Man : and there is usually a small s. m. rr FIG. 92.—Bones of the carpus of a Baboon (Cynocephalus amibis), f £ scaphoid ;/ lunar ; c cuneiform ; p pisiform ; ce central; rs radial sesamoid ; tm trapezium ;id trapezoid ; m magnum ; u unciform ; i—v the metacarpals. rounded radial sesamoid (rs) articulating movably to theborder of the scaphoid and trapezium, and connected withthe tendon of the flexor carpi radialis. In the Potto (Perodicticus) there is an additional bone onthe palmar side of the carpus, an ossification in the ligamentconnecting the palmar processes of the trapezium andunciform bones, and forming with these processes a com-plete bony ring, through which the flexor tendons 1 Mivart, On the Appendicular Skeleton of the Primates ; 1867. xvi.] CARNIVORA. 287 The metacarpals and phalanges are of the complete andnormal number in all, with the following exceptions. In theAfrican genus of Long-tailed Monkeys (Celobus), and also inthe Ameri
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbones, bookyear1885
