Henry Gray (18251861). Anatomy of the Human Body. 1918.
then closed, and thus a shut sac, the auditory vesicle, is formed (Fig. 899); from it the epithelial lining of the membranous labyrinth is derived. The vesicle becomes pear-shaped, and the neck of the flask is obliterated (Fig. 900). From the vesicle certain diverticula are given off which form the various parts of the membranous labyrinth. One from the middle part forms the ductus and saccus endolymphaticus, another from the anterior end gradually elongates, and, forming a tube coiled on