. A system of anatomy for the use of students of medicine (Volume 1). he Ear. A, The hollow part of the cochlea, which forms a share of the meatus au-ditorius internus. B, The vestibulum. C C C, The semicircular canals. Fig. 14. An External View of the Labyrinth. A, the semicircular canals. B, The fenestra ovalis, which leads into thevestibulum. C, The fenestra rotunda which opens into the cochlea. D,The different turns of the cochlea. Fig. 15. The Internal Surface of the Os Sphenoides. A A, The temporal processes. B B, The pterygoid processes. C C, Thespinous processes. D D, The anterior clin
. A system of anatomy for the use of students of medicine (Volume 1). he Ear. A, The hollow part of the cochlea, which forms a share of the meatus au-ditorius internus. B, The vestibulum. C C C, The semicircular canals. Fig. 14. An External View of the Labyrinth. A, the semicircular canals. B, The fenestra ovalis, which leads into thevestibulum. C, The fenestra rotunda which opens into the cochlea. D,The different turns of the cochlea. Fig. 15. The Internal Surface of the Os Sphenoides. A A, The temporal processes. B B, The pterygoid processes. C C, Thespinous processes. D D, The anterior clinoid processes. E, The posteriorclinoid process. F, The anterior process which joins the ethmoid bone. G,The sella turcica for lodging the glandula pituitaria. H, The foramen op-ticum. K. The foramen lacerum. L, The foramen rotundum. M, Theforamen ovale. N, The foramen spinale. Fig. 16. The External Surface of the Os Sphenoides. A A, The temporal processes. B B, The pterygoid processes. C C. Thespinous processes. D, The processus azygos. E, The small triangular pro-. • I • EXPLANATION OF THE PLATES OF OSTEOLOGY. 203 cesses which grow from the body of the bone. F F, The orifices of the sphe-noid sinuses. G, The foramen lacerum. H, The foramen rotundum. I,The foramen ovale. K, The foramen pterygoideum. Fio. 17. The External View of the Os Ethmoides. A, The nasal lamella. B B, The grooves between the nasal lamella andossa spongiosa snperiora. CC, The ossa spongiosa superiora. DD, Thesphenoidal cornua. See Fig. 16, E. Fig. 18. The Internal View of the Os Ethmoides. A, The crista galli. B, The cribriform plate, with the different passagesof the olfactory nerves. C C, Some of the ethmoidal cells. D, The rightos planum. EE, The sphenoidal cornua. Fio. 19. The right Sphenoidal Cornu. Fig. 20. The left Sphenoidal Cornu. Fig. 21. The External Surface of the Os Occipitis. A, The upper part of the bone. B, The superior arched ridge. C, Theinferior arched ridge. Under the arches are prin
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