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Show 55 Parietal arch 349 Occipital arch 195 Longitudinal arch 341 Circumfereooe % 357 Length of frontal ~ 115 Length of parietal 126 Length of occipital 153 Zygomatic diameter 100 Skull No. 1179 rather delicate; is deformed in a more regular manner than either of the others above mentioned, and might very well betaken for that of an ancient Peruvian. The frontal does not recede as mach as it usually does in Peruvian skulls, owing to their mode of deformation, but in this instance the lower anterior portion of the frontal ascends very straight, almost perpendicular, and more so than in any of the other skulls. Viewed from above, it is broadly heart- shaped, having its greatest breadth about one centimeter above the insertion of the retrahens au-rem in a plane projected perpendicular through the posterior portions of the zygomatic processes. The nasal bones and the alveolar processes of the upper jaw protrude to a considerable extent beyond the general outline of the cranium, while the malars and zygomatic processes stand out but slightly, the former, however, more than the latter. In profile the occipital portion of the skull appears perpendicular within a few degrees; only the left portion of the occipital bone protrudes a little near the superior curved line, which on this side is more developed than on the other. Left zygomatic process slender; the right one defective, partly broken. Nasal bones very projecting, indicating a Bomau nose. Facial portion comparatively small; forehead narrow; frontal tubers well developed; superciliary ridges but slightly indicated. Malars slender; anterior nasal spine prominent; raaxill ® very nearly orthognathic. Teeth very irregular; left iucisors of upper jaw missing; the first right one very large, while the second is unnaturally small. Canines standing very oblique, their crowns inclined to a considerable extent toward the symphysis. Second right bicuspid temporary; permanent one in the act of eruption, last molars not yet cut, their position somewhat abnormal. The teeth of the lower jaw are more regular. Both false molars of the left side and second on the right missing, last molar not yet erupted. Mental process well developed; exterior oblique line slightly indicated; sigmoid notch flat; ridges for the insertion of the masseter slight; anterior border of ramus almost straight. The base of the skull is nearly triangular, and only slightly asymmetrical. Posterior outline of occipital almost straight, and approaching within half a centimeter toward the posterior margin of the foramen magnum. Muscular insertions highly developed; occipital protuberance very much elongated. Condyles long and narrow; their surfaces quite uneven. Only the right posterior condyloid foramen developed and very small; fossa on this side shallow; the one opposite deep. Measurements. c cm. Capacity 1380 mm. Length 153 Breadth 156 Breadth of frontal V2& Height 142 Frontal arch 316 Parietal arch 370 Occipital arch 240 |