I once had the opportunity myself of seeing a hemicephalus, living, who was brought to the clinic of my respected colleague, Prof. B. Schultze, in Jena. The child was of the male sex, and was born on the 1st of July, 1883, at noon, along with a perfectly normal twin sister. The parents are of sound condition. I saw the child for the first time on the 3d of July, at two o'clock. I found all the parts of the body, except the head, like those of ordinary children born at the right time. The head had on it a great red lump like a tumor, and came to an end directly over the eyes, going down abruptly behind; but, even if the tumor were supposed to be covered with skin, there would by no means be the natural arched formation of the cranium of a newly-born child. The face, too, absolutely without forehead, was smaller in comparison than the rest of the body. I found now, in the case of this child, already two days old, a remarkably regular breathing, a very cool skin--in the forenoon a specific warmth of 32 deg. C. had been found--and slight mobility. The eyes remained closed. When I opened them, without violence, the pupil was seen to be immobile. It did not react in the least upon the direct light of the sun on either side. The left eye did not move at all, the right made rare, convulsive, lateral movements. The conjunctiva was very much reddened. The child did not react in the least to pricks of a dull needle tried on all parts of the body, and reacted only very feebly to pinches; not at all to sound-stimuli, but regularly to stronger, prolonged cutaneous stimuli; in particular, the child moved its arms after a slap on the back, just like normal new-born children, and uttered very harsh, feeble tones when its back was rubbed. When I put my finger in its mouth vigorous sucking movements began, which induced me to offer the bottle--this had not yet been done. Some cubic centimetres of milk were vigorously swallowed, and soon afterward the breast of a nurse was taken. While this was going on I could feel quite distinctly with my finger, under the chin, the movements of swallowing. It was easy to establish the further fact that my finger, which I laid in the hollow of the child's hand, was frequently clasped firmly by the little fingers, which had well-developed nails. Not unfrequently, sometimes without previous contact, sometimes after it, the tip of the tongue, and even a larger part of the tongue, was thrust out between the lips, and once, when I held the child erect, he plainly gave a prolonged yawn. Finally, the fact seemed to me very noteworthy that, after being taken and held erect, sometimes also without any assignable outward occasion, the child inclined its head forward and turned it vigorously both to the right and to the left. When the child had sucked lustily a few times, it opened both eyes about two millimetres wide, and went on with its nursing. An assistant physician saw the child sneeze.