sacrum

Baptismum accipiebant velut sacrum aliquod signum similitudinis & confœderationis cum Gallis.

The os sacrum is composed of five vertebr, as in man, but in apes or monkeys of only three.

Fig. 4, represents one of the lumbar vertebræ, (five in number,) which are immediately above the sacrum.

There are but two positions worthy of notice in this presentation, and they are determined by the child's sacrum.

The body always rotates so that the back comes in front, and the chin passes into the curve of the Sacrum.