. Human embryology and morphology. Embryology, Human; Morphology. Fig 138. 60-75%. 80-90% Fig. 138.—Diagram of a Long-head (Dolichocephalic). Fig. 139.—Diagram of a Short-head (Brachycephalie). between the widest points'—the parietal eminences. If the length of a skull is 100 mm. and the breadth 75, the cephalic index of that skull is 75, the breadth is 75°/0 of the length. Human races, on an average, are either Dolichocephalic (long-headed), the breadth being 75°/0 or less of the length; Brachycephalie, in which the breadth is 80°/o or more of length; or Meso-cephalic, in which the bread
. Human embryology and morphology. Embryology, Human; Morphology. Fig 138. 60-75%. 80-90% Fig. 138.—Diagram of a Long-head (Dolichocephalic). Fig. 139.—Diagram of a Short-head (Brachycephalie). between the widest points'—the parietal eminences. If the length of a skull is 100 mm. and the breadth 75, the cephalic index of that skull is 75, the breadth is 75°/0 of the length. Human races, on an average, are either Dolichocephalic (long-headed), the breadth being 75°/0 or less of the length; Brachycephalie, in which the breadth is 80°/o or more of length; or Meso-cephalic, in which the breadth is between 75°/D and 80°/o of the length. The English people have an average index of 75, the South Germans 83, but it must be remembered the individuals vary widely. It will be seen that the topography of the brain, worked out by German surgeons, cannot be applied to the longer English heads without modification. The Facial Angle is the angle at which the face projects from the base of the skull (Fig. 140). The skull consists in man, as in all mammals, of two parts—the facial part, which carries the teeth and is developed according to their size, and the brain capsule, which depends on the size of the brain. The smaller the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Keith, Arthur, Sir, 1866-1955. London : E. Arnold
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