. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. TERATOLOGY. the forehead, round which is twisted the um- bilical cord. Fie/. Kerckring* inveighed in a spirited and in- genious manner against the strange accounts which were formerly given of these moke. To the diseases of the placenta are referred enlargement (Kyll, Pierrard, Devilliers), con- gestion and apoplexy (J. Clarke, Dangan), calcareous concretions (Hannover). For the cetiology of malformations, this pathological anatomy of the placenta is, however, very un- productive. None of these can be explained by
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. TERATOLOGY. the forehead, round which is twisted the um- bilical cord. Fie/. Kerckring* inveighed in a spirited and in- genious manner against the strange accounts which were formerly given of these moke. To the diseases of the placenta are referred enlargement (Kyll, Pierrard, Devilliers), con- gestion and apoplexy (J. Clarke, Dangan), calcareous concretions (Hannover). For the cetiology of malformations, this pathological anatomy of the placenta is, however, very un- productive. None of these can be explained by it, nor were any accompanied by these pla- cental diseases. Nor does the nosology of the foetus afford us much more information, notwithstanding the monograph given by J. It cannot, however, be denied, that some of Us diseases may give rise to deformities ; for in- stance, chronic inflammation of the brain to hydrops vcntriculorum ccrebri, and this again to Acrania. Perhaps also, as Rokitansky states, a morbid condition of the valves may be the cause of some congenital abnormities of the heart. Yet, notwithstanding all this, the diseases of the foetus can only, in a very limited sense, be assigned as the cause of its malformation; and hence the opinion of Otto, who ascribes , to this source a great many malformations, In some, but very rare, cases, the coats of ou(T,n tQ be rejectet|. the ovum are destroyed, and the foetus is nn- | A fourtn) aild assuredly very general, mediately attached to the inner surface of the ^^ of maiformation, consists in impeded de- uterus ( Steinmetz). It is not to be denied, that ve|opement of tne foetus by some remote and un- through these pseudo-membranes some mal- twirt£n ^nil<5p. it is matter of dispute whether formations of the foetus may be occasioned, as Montgomery has proved,such as the truncation " ' xtremities, which he names self-ampu- tation. Further than this, however, we may not go, for the brides placentaires of Pr
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