CHAP. X. Of the holes of the inner Basis of the Skull.
IN the first place are reckoned the holes of the bone Ethmoides; then those of the Optick-nerves. Thirdly, of the nerves moving the Eyes. Fourthly, of that portion, of the nerves of the fourth conjugation which go to the temporal muscles. Fiftly, are reckoned those holes scarce visible, situate under the pituitary glandule, by which the spittle is evacuated. Sixthly, that hole which is in the wedg-bone made for the entrance into the internal sleepy Arteries, com∣posing the Wonderful Net, and then passing into the brain by a great Slit. That perforation which we reckon in the seventh place is commonly double, made for the entrance of one of the bran∣ches of the internal Jugular-vein. The eighth hole is somewhat long, of an Oval figure, by which, part of the third conjugation and all the fourth conjugation passes forth. The ninth are the audi∣tory passages. The tenth are very small holes, and give way to the vein and artery going to the auditory passage, above the foramen caecum. In the eleventh place are reckoned the perforations which yield passage forth to the sixth pair of nerves, to part of the sleepy Arteries, and of the internal Jugular. In the twelfth, those which yield a way out to the seventh conjugation. The great hole of the Nowl-bone through which the spinal marrow passes, is reckoned the thirteenth. The fourteenth is that, which most commonly is behind that great Hole, by which the Cervical veins and arteries enter in.