_Amputation of the head._--The head is first seized and drawn well forward, or even outside the vulva, by a rope with a running noose placed around the lower jaw just behind the incisor teeth, by a sharp hook inserted in the arch of the lower jaw behind the union of its two branches and back of the incisor teeth, or by hooks inserted in the orbits, or, finally, in case the whole head protrudes, by a halter. (Pl. XXI, figs 4_a_ and 4_b._) In case the whole head protrudes, a circular incision through the skin is made just back of the ear, and the cut edge being held firmly by the left hand, the neck is skinned as far as it can be reached. Then the great ligamentous cord above the spine is cut across at the farthest available point, together with the muscles above and below the spine. Strong traction on the head will then detach it at this point and bring it away, but should there still be too much resistance the knife is inserted between the bodies of two vertebrÊ just behind one of the prominent points felt in the median line below, and their connecting fibrous cartilage is cut through, after which comparatively moderate pulling will bring it away. The detached neck and body at once slip back into the womb, and if the fore limbs are now brought up and pulled they are advanced so far upon the chest that the transverse diameter of that is greatly diminished and delivery correspondingly facilitated. If the head is still inclosed in the vagina two methods are available: (1) The removal of the lower jaw and subsequent separation of the head from the neck; (2) the skinning of the whole head and its separation from the neck. To remove the lower jaw the skin is dissected away from it until the throat is reached. Then the muscles of the cheeks and side of the jaw (masseters) are cut through and those connecting the jaw with the neck. When traction is made on the rope around the lower jaw it will usually come away with little trouble. Should it resist, its posterior extremity on each side (behind the grinding teeth) may be cut through with bone forceps or with a guarded bone chisel. (Pl. XX, fig. 8.) After the removal of the lower jaw the way will be open to separate the head from the neck, the knife being used to cut into the first or second joint from below, or the bone forceps or chisel being employed to cut through the bones of the neck. Then traction is made on the head by means of hooks in the orbits, and the hand, armed with an embryotomy knife, is introduced to cut through the tense resisting ligament, and muscles above the bones. The skin and the strong ligamentous cord attached to the poll are the essential things to cut, as the muscles can easily be torn across. Unless there are great difficulties in the way it is well to skin the head from the eyes back, and on reaching the poll to cut through the ligament and then bring the head away by pulling.