xxviii LIST OF ILLUSTRATIONS 



FIGURE PAGB 



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 



