The principles and practice of obstetrics . <m. O T Sinclairs litk,Pkla ANTERIOR FONTANEL TO VERTEX PRESENTATION. 313 the forehead at the right sacro-iliac symphysis. (PlateXXL, Fig. 109.) Hence, the occipito-frontal diameterwill now correspond to the left oblique at the superiorstrait, as a substitute for the cervico-bregmatic invertex presentations. This is a mechanical right parietal protuberance being at the right ace-tabulum, and the left at the left sacro-iliac symphysis,the bi-parietal diameter, as in vertex presentations,corresponds with the right oblique. Hence, it re
The principles and practice of obstetrics . <m. O T Sinclairs litk,Pkla ANTERIOR FONTANEL TO VERTEX PRESENTATION. 313 the forehead at the right sacro-iliac symphysis. (PlateXXL, Fig. 109.) Hence, the occipito-frontal diameterwill now correspond to the left oblique at the superiorstrait, as a substitute for the cervico-bregmatic invertex presentations. This is a mechanical right parietal protuberance being at the right ace-tabulum, and the left at the left sacro-iliac symphysis,the bi-parietal diameter, as in vertex presentations,corresponds with the right oblique. Hence, it resultsthat in this presentation the occipito-frontal circum-ference and plane of the head (Plate IV., Figs. 28 and29) coincide with those of the superior strait (PlateII., Fig. 8) and orifice of the uterus, as a substitutefor the cervico-bregmatic circumference and planewhich are interested in vertex presentations. The top of the head or anterior fontanel is now op-posed to the bottom or coccygeal region of the pelvis,and the base of the head will
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