The female insectivorous pelvis is relatively large, the sacroiliac junction usually being long and well knit while the pubes are slender, wide of angle as to their descending rami and there may be no symphysis, as in bats. Edentates have distinct bony unions of the elements of the innominate bone and of this to the sacrum which increases in width downward permitting a long synostosis with ischia and pubes; these joints are not movable. The pubes are slender and the symphysis short. The sacrosymphyseal angle is 80 degrees in the armadillo. The inlet is roughly triangular to almost round. Cetacea have no clearly developed pelvis, its place being represented by two long bones, larger in males, which seem to be the insertion of the genital erector muscles. There is no junction to form a pelvis nor is there an acetabulum. A pelvic box is absent in the Sirenia, but lateral processes from the lumbar vertebræ form a sort of ileum between which an ischium is located. Proboscidea have a massive pelvis lying vertical to the spine. The iliac alæ are wide and deeply concave; the ischia are short, heavy and parallel to the ilia; the pubes are short and combined in a heavy symphysis; the sacroiliac joint is short, heavy and slightly movable; the outlet is ovate. In one specimen examined the length was 4 feet, symphysis 18 inches, true conjugate 19 inches, transverse diameter 17.5 inches; crests of iliac were 28 inches long. Perissodactylic animals throughout this suborder have similar pelves except in so far as the obliquity is concerned. In the rhinoceros it is 90° with the spinal column, in the horse 135°; the angle of the true conjugate is 10° in the former, 50° in the latter. The lateral halves of the box are heavy and parallel; the symphysis is short in the rhinoceros, large in the horse; the outlet is ovoid. Artiodactyla, including pachyderms and ruminants, show a variety of shapes and constructions. Hippopotami have a short massive box tilted at about 150° from the spine, with widely flaring ilia and ischia; the pubes are slender but not combined in a strong symphysis. In ruminants the sacrum consists of four fused units; the sacroiliac joint is fairly movable; the obliquity is about 145°; ilia are long and slender and flaring; the ischia are broad and parallel with the ilia; pubes are slender but form a symphysis about two-fifths the total pelvic length; the infrapelvic angle is wide; the outlet of the pelvis is almost rectangular. The general characteristics of the carnivorous pelvis may be summarized as consisting of a long strong symphysis, parallel lateral pelvic walls, a great sacrosymphyseal angle, and a marked separation of the bodies of the ischia. The sacroiliac joint is in general moderately movable.