. Manual of antenatal pathology and hygiene : the foetus. sure with being made U]i Ialx cerebri; d, beginning of sylvian Kssure : c, left optic ]),. jjjg tibrOUS nerve;/, left sufking-pad ; y, cystic tumour below tongue ; _ . 1. t . h, tongue out transversely : h, right fossa, showing tympanic platl^ , superior, middle, and inferior meatuses ; I, orbital jilate of the mastoid air frontal bone ; ///., zygoma near its root; ji, tooth germ in cgUs are not de-ui)i)er maxilla. , , ,\, veloped; and the annulus tympanicus forms a very slight projection. The meatus withthe soft pirts in situ is
. Manual of antenatal pathology and hygiene : the foetus. sure with being made U]i Ialx cerebri; d, beginning of sylvian Kssure : c, left optic ]),. jjjg tibrOUS nerve;/, left sufking-pad ; y, cystic tumour below tongue ; _ . 1. t . h, tongue out transversely : h, right fossa, showing tympanic platl^ , superior, middle, and inferior meatuses ; I, orbital jilate of the mastoid air frontal bone ; ///., zygoma near its root; ji, tooth germ in cgUs are not de-ui)i)er maxilla. , , ,\, veloped; and the annulus tympanicus forms a very slight projection. The meatus withthe soft pirts in situ is proliably of about the same relative length asin the child or adult; it has no anterior or posterior curve ujion it :and its inner or tym])anic end is somewhat enlarged to form thesinus. The external ear, then, is in a transition state in the fat\is ;so is the skull in its neighbourhood. Anterior to the meatus is tlieantero-lateral fontanelle (region pterion), while jiosterior to it isthe postero-lateral fontanelle (region asteiion ), and between these. Fig. 19.—Coronal section of head of futus in jilane posterior to THE EAR OF THl. IXKTUS 105 two foiitanelles is a medley of small bones ami cartilage islands,.showing that development is not far advanced in this Adachi (Zfschr. f. Morjiliol. u. Anthrop., ii. p. 223, 1900) hasgiven an interesting description of the changes which occur in thisneighbourhood in the fcetus and new-born infant. Post-natal develop-ment is necessary before the tympanic and snuamoso-zygomatic parts
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1902
