. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. The superior cervical part of a peroccphalous lamb, terminated by the ears which are coalesced with, each Tlie skeleton of the parts represented in fg. 620., with the trachea and the oesophagus. a, squamous part, and b, condyloid part of the occipital bone; c, petrous ; d, squamous, part of the temporal bone; e, parietal boue; /, auditory bones. evolution, the head, the superior and the infe- rior limbs, were wanting. There existed only a trunk, which contained a tolerably large heart, imperfect lungs, a malforme
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. The superior cervical part of a peroccphalous lamb, terminated by the ears which are coalesced with, each Tlie skeleton of the parts represented in fg. 620., with the trachea and the oesophagus. a, squamous part, and b, condyloid part of the occipital bone; c, petrous ; d, squamous, part of the temporal bone; e, parietal boue; /, auditory bones. evolution, the head, the superior and the infe- rior limbs, were wanting. There existed only a trunk, which contained a tolerably large heart, imperfect lungs, a malformed liver, a stomach, and an intestinal canal. From this survey of the characteristics which distinguish the acephali, we learn that they are born with two, three, or four other foe- tuses at one birth. Can this quantitative multiplication of the children be the cause of the qualitative malformation of one of them? This is probable by the great fertility of the mothers of acephali, which also indicates that these monsters are produced by an arrest of developement. It is very easy to reduce their external appearance to the early periods of developement, in which the head is not yet distinct from the trunk, and in which the limbs are not yet protruded. It is worth mentioning that the abdominal cavity, with the kidneys and a part of the intestinal canal, are the most constant organs, which is very interesting with reference to the genesis of the intestinal tract. In the monstrous births of the second, third, and fourth type, there is only a colon, while in those in which a tho- rax is superadded (as in the fifth and sixth types), there is also an intestinum tenue with the coscum. I regard this as a confirmation of the statement, that the formation of the intestinal canal commences at the two ex- tremes, and proceeds from these to the mid- dle part. In the same manner the uniformity of cir- cumference of the whole intestinal tube is an arrest of developement at an early period of em
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