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At three-fourths of the width of the bone, the fracture ran parallel with the sagittal suture, and this large portion was depressed upon the tunics of the brain, the dura mater being considerably lacerated.
The skull of this great Eocene sea-monster, in fact, shows by the narrow and prolonged interorbital region; the extensive union of the parietal bones in a sagittal suture; the well-developed nasal bones; the distinct and large incisors implanted in premaxillary bones, which take a full share in bounding the fore part of the gape; the two-fanged molar teeth with triangular and serrated crowns, not exceeding five on each side in each jaw; and the existence of a deciduous dentition its close relation with the Seals.
Then at one stroke he cut off his head, cutting his scalp upon the temple-bones, and lifting up in the upper part of the skull the two triangulary bones called sincipital, or the two bones bregmatis, together with the sagittal commissure or dartlike seam which distinguisheth the right side of the head from the left, as also a great part of the coronal or forehead bone, by which terrible blow likewise he cut the two meninges or films which enwrap the brain, and made a deep wound in the brain's two posterior ventricles, and the cranium or skull abode hanging upon his shoulders by the skin of the pericranium behind, in form of a doctor's bonnet, black without and red within.
Leonardo da Vinci, in a well-known drawing representing a sagittal section of a man and a woman connected in this position of so-called Venus obversa; has shown how well adapted the position is to the normal position of the organs in the human species.
On raising a strip of skin, still adhering to the skull, there was seen on the front part of the sagittal suture a very small perforation, the result either of a wound or of an operation which bad taken place during life.
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