. On the anatomy of vertebrates [electronic resource] . ia are shortand broad, forming an an-terior concavity. The is-chial tuberosities are small,and the part joining thepubis to circumscribe thelarge obturator foramina isslender. The pubis is alsoslender, and forms a veryshort symphysis, c. Thepelvic outlet is wide. In the Two-toed Sloths(Choloepits) the vertebral formula is C 7, I) 23, L 3, s 8, cd 4,or d 24, l 2 ; or d 23, l 4, s 7, the number being essentially the same. The second and zoo third cervicals sometimescoalesce. Cholcepus Hoff-inarini has only six Twelve pairs of r
. On the anatomy of vertebrates [electronic resource] . ia are shortand broad, forming an an-terior concavity. The is-chial tuberosities are small,and the part joining thepubis to circumscribe thelarge obturator foramina isslender. The pubis is alsoslender, and forms a veryshort symphysis, c. Thepelvic outlet is wide. In the Two-toed Sloths(Choloepits) the vertebral formula is C 7, I) 23, L 3, s 8, cd 4,or d 24, l 2 ; or d 23, l 4, s 7, the number being essentially the same. The second and zoo third cervicals sometimescoalesce. Cholcepus Hoff-inarini has only six Twelve pairs of ribsjoin the sternum, whichconsists of eleven any of the great extinctGround Sloths have morethan seven cervical verte-brae ; but in the number ofdorsal vertebras, as in everyother bradypodal character,they manifest their true af-finities. The Mylodon, , offers a singular con-trast with the Mole, fig. 248, in the proportions of the sacrum:this, by anchylosis with the three lumbar and last dorsal, dls, Cervical and dorsal vertebrae. 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
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