. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 954 TERATOLOGY. lary bones are largely separated from each other posteriorly, so as to form a fissure, more or less extensive, of the bony and of the soft palate. Sometimes there is only a fissure of the uvula (Von Ammon). The nearest ap- proach to the natural state is, when the planes of the palatine bones form with each other nn acute angle rising high upwards in the nasal cavity (Himly, W. Vrolik). In some cases, the palate is fissured at its anterior part, close to the foramen palatinum anticum (hiatus fora- minis pa
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 954 TERATOLOGY. lary bones are largely separated from each other posteriorly, so as to form a fissure, more or less extensive, of the bony and of the soft palate. Sometimes there is only a fissure of the uvula (Von Ammon). The nearest ap- proach to the natural state is, when the planes of the palatine bones form with each other nn acute angle rising high upwards in the nasal cavity (Himly, W. Vrolik). In some cases, the palate is fissured at its anterior part, close to the foramen palatinum anticum (hiatus fora- minis palatini antici, Von Ammon). En re- sume, it appears that fissure of the palate and hare-lip are independent of each other. But it may happen that, originally, the fissure of the palate coexists with the hare-lip and closes itself later. The indentation which is ob- served in hare-lip without fissure of the palate, between the external incisive and the canine tooth, makes it probable that nature proceeds in this manner. It is also not improbable that hare-lip may sometimes be cured spontane- ously in the womb. The gradual transition of the various forms of this malformation into each other, shows that its cause is not external and accidental, and that it is produced, neither by blows which the child inflicts upon itself with its fists (Jourdain), nor by a mechanical im- pediment preventing the union of the palatine lamina? (Pinnder). Complete fissure of the face and the palate is rather to be considered as an arrest of developement at an early period of formation. Hare-lip conforms with the foetal condition in that period of develope- ment which I have called the third. If the original intermediate protuberance does not unite itself with the lateral parts, double hare- lip is formed. The protuberance obvious in it is formed by the intermaxillary bone either in its totality, or only by a part of it. If it unites itself with only one lateral part, single hare-lip is formed. The in
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