Plate XXVIII.
This Plate represents the head descended still lower in the Pelvis.
PLATE XXIX.
Here the head is seen just beginning to turn—the right side, and part of the back of it, just passing under the pubes. As the rotation becomes complete the neck straightens, so that the two fontanelles are again found on the same level. Finally the back of the head fully emerges from under the pubic arch, and the chin slides gradually out after it beneath, so that the neck of the child is encircled by the ring of the Vulva.
Plate XXIX.
This Plate represents the head still further down, and beginning to Rotate.