. On the anatomy of vertebrates [electronic resource] . Pelvis of the Ai, anterior view. SKELETON OF BRUTA. 401 includes eleven vertebrae, and forms one strong and continuousbony mass along the whole lumbar region. Its total length istwo feet four inches, and it gradually increases in breadthto the sacro-iliac union, which is formed by the first, second,and third true sacral vertebra?, and there presents its greatestbreadth. It then contracts slightly, and, at the sixth and last,expands again to join the ischia, fig. 268, c, with which and 267. Mylodon robustus. xc\ the ilia it coalesces. Its
. On the anatomy of vertebrates [electronic resource] . Pelvis of the Ai, anterior view. SKELETON OF BRUTA. 401 includes eleven vertebrae, and forms one strong and continuousbony mass along the whole lumbar region. Its total length istwo feet four inches, and it gradually increases in breadthto the sacro-iliac union, which is formed by the first, second,and third true sacral vertebra?, and there presents its greatestbreadth. It then contracts slightly, and, at the sixth and last,expands again to join the ischia, fig. 268, c, with which and 267. Mylodon robustus. xc\ the ilia it coalesces. Its anterior surface is curved both laterallyand vertically. The spinal canal is very wide, and the foraminapassing from it mark the primary segments. Their neural spinesform a curved crest, ib. g. There are twenty-one caudal ver-tebrae, fig. 267, cd. The iliac crest is arched, thickened, andrough ; the alae notably expanded. The ischia, after effectingthe sacral confluence, at c, arch outward, of slender form, andexpand, at h, fig. 268, to join the still more slender pubis, b, VOL. II. D D 402 ANATOMY OF VERTEBRATES.
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