Xxviii LIST OF ILLUSTEATIONS 



FIGURE PAGE 



572. From the external acoustic meatus of man .... 684 



573. Transection of the tympanic membrane of a child . . . 687 



574. Section through the margin of the tympanic membrane of a child . 688 



575. The auditory ossicles ........ 689 



576. The cavity of the tympanum, viewed from above . . . 690 



577. Transection of the Eustachian tube; diagrammatic . . . 692 



578. The bony labyrinth .. 694 



579. Diagram of the membranous labyrinth in lateral view . 695 



580. Diagram of the right membranous labyrinth .... 696 



581. The isolated membranous labyrinth ...... 696 



582. Transection of the margin of the macula acustica sacculi of a guinea- 

 pig . . 697 

 583. Nerve endings in the macula acustica of a guinea-pig . . . 698 

 584. Transection of a human semicircular canal .... 700 



585. Axial section through the cochlea of a fetal calf . . . .701 



586. Axial section through a turn of the cochlea of a guinea-pig . . 702 

 587. A radial section through Corti's organ in the first turn of the human 



cochlea .......... 707 



588. Diagram of the organ of Corti . . . . . . .711 



589. Axial section through Corti's organ of the guinea-pig, showing the 



terminal nerve fibrils . . . . . . . .713 



590. Scheme of the vascular supply of the internal ear . .714 



591. Scheme of the vascular terminations in the wall of the cochlear 



canals .......... 715 



592. Semidiagrammatic illustrations of successive stages in the develop- 

 ment of the internal ear of the chick . . . . .718 



593. Wax reconstructions of three early stages in the development of the 



internal ear (membranous labyrinth) of man .... 718 



594. A method of preparing a paper box for paraffin embedding . . 737 



. PLATES 



A. Successive stages in the spermatogenesis of Schistocerca damnifica . 465 

 B. Successive stages in the spermatogenesis of Schistocerca damnifica 



(continued) ..... ... 467 



C. Successive stages in the spermatogenesis of Schistocerca damnifica 



(continued) . . ..... 469 



D. Successive stages in the growth, maturation, and fertilization of the 



egg of the starfish, Asterias forbesii . . . . . .471 



