Figure 850 - Vertical section of papilla foliata of the rabbit, crossing the folia.
Figure 851 - Taste-bud, highly magnified.
Figure 852 - Cartilages of the nose. Side view.
Figure 853 - Cartilages of the nose, seen from below.
Figure 854 - Bones and cartilages of septum of nose. Right side.
Figure 855 - Lateral wall of nasal cavity.
Figure 856 - Lateral wall of nasal cavity; the three nasal conchæ have been removed.
Figure 857 - Section of the olfactory mucous membrane.
Figure 858 - Nerves of septum of nose. Right side
Figure 859 - Coronal section of nasal cavities.
Figure 860 - Specimen from a child eight days old. By sagittal sections removing the lateral portion of frontal bone, lamina papyracea of ethmoid, and lateral portion of maxilla—the sinus maxillaris, cellulæ ethmoidales, anterior and posterior, infundibulum ethmoidale, and the primitive sinus frontalis are brought into view. 141
Figure 861 - Specimen from a child one year, four months, and seven days old. Lateral view of frontal, ethmoidal, and maxillary sinus areas.
Figure 862 - Specimen from a child eight years, eight months, and one day old. Lateral view of frontal, ethmoidal and maxillary sinus areas, the lateral portion of each having been removed by sagittal cuts. Note that the sinus frontalis developed directly from the infundibulum ethmoidale. Note also the incomplete septa in the sinus maxillaris.
Figure 863 - Transverse section of head of chick embryo of forty-eight hours’ incubation.
Figure 864 - Transverse section of head of chick embryo of fifty-two hours’ incubation.
Figure 865 - Optic cup and choroidal fissure seen from below, from a human embryo of about four weeks.
Figure 866 - Horizontal section through the eye of an eighteen days’ embryo rabbit.
Figure 867 - Sagittal section of eye of human embryo of six weeks.
Figure 868 - Section of developing eye of trout.
Figure 869 - Horizontal section of the eyeball.
Figure 870 - Enlarged general view of the iridial angle.
Figure 871 - Vertical section of human cornea from near the margin. 1. Epithelium. 2. Anterior elastic lamina. 3. substantia propria. 4. Posterior elastic lamina. 5. Endothelium of the anterior chamber. a. Oblique fibers in the anterior layer of the substantia propria. b. Lamellæ the fibers of which are cut across, producing a dotted appearance. c. Corneal corpuscles appearing fusiform in section. d. Lamellæ the fibers of which are cut longitudinally. e. Transition to the sclera, with more distinct fibrillation, and surmounted by a thicker epithelium. f. Small bloodvessels cut across near the margin of the cornea.
Figure 872 - The choroid and iris.
Figure 873 - The arteries of the choroid and iris. The greater part of the sclera has been removed.
Figure 874 - The veins of the choroid.
Figure 875 - Interior of anterior half of bulb of eye.
Figure 876 - Vessels of the choroid, ciliary processes, adn iris of a child. Magnified 10 times. a. Capillary net-work of the posterior part of the choroid, ending at b, the ora serrata. c. Arteries of the corona ciliaris, supplying the ciliary processes, d, and passing into the iris e. f. The capillary net-work close to the pupillary margin of the iris.
Figure 877 - Diagram of the blood vessels of the eye, as seen in a horizontal section. . Course of vasa centralia retinæ: a. Arteria. a. 147 Vena centralis retinæ. B. Anastomosis with vessels of outer coats. C. Anastomosis with branches of short posterior ciliary arteries. D. Anastomosis with chorioideal vessels. Course of vasa ciliar. postic. brev.: I. Arteriæ, and I1. Venæ ciliar. postic. brev. II. Episcleral artery. II1. Episcleral vein. III. Capillaries of lamina choriocapillaris. Course of vasa ciliar. postic. long.: 1. a. ciliar. post. longa. 2. Circulus iridis major cut across. 3. Branches to ciliary body. 4. Branches to iris. Course of vasa ciliar. ant.: a. Arteria. a1. Vena ciliar. ant. b. Junction with the circulus iridis major. c. Junction with lamina choriocapill. d. Arterial, and d1. Venous episcleral branches. e. Arterial, and e1. Venous branches to conjunctiva scleræ. f. Arterial, and f1. Venous branches to corneal border. V. Vena vorticosa. S. Transverse section of sinus venosus scleræ.
Figure 878 - Iris, front view.
Figure 879 - Interior of posterior half of bulb of left eye. The veins are darker in appearance than the arteries.
Figure 880 - The terminal portion of the optic nerve and its entrance into the eyeball, in horizontal section.
Figure 881 - Section of retina.
Figure 882 - Plan of retinal neurons.
Figure 883 - The upper half of a sagittal section through the front of the eyeball.
Figure 884 - The crystalline lens, hardened and divided.
Figure 885 - Diagram to show the direction and arrangement of the radiating lines on the front and back of the fetal lens. From the front. B. From the back.
Figure 886 - Profile views of the lens at different periods of life. In the fetus. 2. In adult life. 3. In old age.
Figure 887 - Section through the margin of the lens, showing the transition of the epithelium into the lens fibers.
Figure 888 - Sagittal section of right orbital cavity.
Figure 889 - Muscles of the right orbit.
Figure 890 - Dissection showing origins of right ocular muscles, and nerves entering by the superior orbital fissure.
Figure 891 - The right eye in sagittal section, showing the fascia bulbi .
Figure 892 - Front of left eye with eyelids separated to show medial canthus.
Figure 893 - Sagittal section through the upper eyelid. Skin. b. Orbicularis oculi. b’. Marginal fasciculus of Orbicularis (ciliary bundle). c. Levator palpebræ. d. Conjunctiva. e. Tarsus. f. Tarsal gland. g. Sebaceous gland. h. Eyelashes. i. Small hairs of skin. Sweat glands. k. Posterior tarsal glands.
Figure 894 - The tarsi and their ligaments. Right eye; front view.
Figure 895 - The tarsal glands, etc., seen from the inner surface of the eyelids.
Figure 896 - The lacrimal apparatus. Right side.
Figure 897 - Alveoli of lacrimal gland.
Figure 898 - Section through the head of a human embryo, about twelve days old, in the region of the hind-brain.
Figure 899 - Section through hind-brain and auditory vesicles of an embryo more advanced than that of Fig. 898.
Figure 900 - Lateral views of membranous labyrinth and acoustic complex. absorpt. focu, area of wall where absorption is complete; amp., ampulla membranacea; crus, crus commune; d. sc. lat., ductus semicircularis lateralis; d. sc. post., ductus semicircularis posterior; d. sc. sup., ductus semicircular superior; coch. or cochlea, ductus cochlearis; duct. endolymph, ductus endolymphaticus; d. reuniens, ductus reuniens Henseni; endol. or endolymphs appendix endolymphaticus; rec. utr., recessus utriculi; sacc., sacculus; sac. endol., saccus endolymphaticus; sinus utr. lat., sinus utriculi lateralis; utric., utriculus; vestib. p., vestibular pouch.
Figure 901 - Median views of membranous labyrinth and acoustic complex in human embryos.
Figure 902 - Transverse section through head of fetal sheep, in the region of the labyrinth.
Figure 903 - Transverse section of the cochlear duct of a fetal cat.
Figure 904 - The auricula. Lateral surface.
Figure 905 - Cranial surface of cartilage of right auricula.
Figure 906 - The muscles of the auricula.
Figure 907 - External and middle ear, opened from the front. Right side.
Figure 908 - Horizontal section through left ear; upper half of section.
Figure 909 - Right tympanic membrane as seen through a speculum.
Figure 910 - The tympanic membrane viewed from within. The malleus has been resected immediately beyond its lateral process, in order to show the tympanomalleolar folds and the membrana flaccida. 1. Tympanic membrane. 2. Umbo. 3. Handle of the malleus. 4. Lateral process. 5. Anterior tympanomalleolar fold. 6. Posterior tympanomalleolar fold. 7. Pars flaccida. 8. Anterior pouch of Tröltsch. 9. Posterior pouch of Tröltsch. 10. Fibrocartilaginous ring. 11. Petrotympanic fissure. 12. Auditory tube. 13. Iter chordæ posterius. 14. Iter chordæ anterius. 15. Fossa incudis for short crus of the incus. 16. Prominentia styloidea.
Figure 911 - View of the inner wall of the tympanum
Figure 912 - The right membrana tympani with the hammer and the chorda tympani, viewed from within, from behind, and from above.
Figure 913 - Coronal section of right temporal bone.
Figure 914 - The medial wall and part of the posterior and anterior walls of the right tympanic cavity, lateral view.
Figure 915 - Auditory tube, laid open by a cut in its long axis.
Figure 916 - Left malleus. A. From behind. From within.
Figure 917 - Left incus. A. From within. From the front.
Figure 918 - A. Left stapes. B. Base of stapes, medial surface.
Figure 919 - Chain of ossicles and their ligaments, seen from the front in a vertical, transverse section of the tympanum.
Figure 920 - Right osseous labyrinth. Lateral view.
Figure 921 - Interior of right osseous labyrinth.
Figure 922 - Position of the right bony labyrinth of the ear in the skull, viewed from above. The temporal bone is considered transparent and the labyrinth drawn in from a corrosion preparation.
Figure 923 - The cochlea and vestibule, viewed from above. All the hard parts which form the roof of the internal ear have been removed with the saw.
Figure 924 - The membranous labyrinth.
Figure 925 - Right human membranous labyrinth, removed from its bony enclosure and viewed from the antero-lateral aspect.
Figure 926 - The same from the postero-medial aspect. 1. Lateral semicircular canal; 1’, its ampulla; 2. Posterior canal; 2’, its ampulla. 3. Superior canal; 3’, its ampulla. 4. Conjoined limb of superior and posterior canals . Utricle. 5’. Recessus utriculi. 5”. Sinus utriculi posterior. 6. Ductus endolymphaticus. 7. Canalis utriculosaccularis. 8. Nerve to ampulla of superior canal. 9. Nerve to ampulla of lateral canal. 10. Nerve to recessus utriculi (in Fig. 925, the three branches appear conjoined). 10’. Ending of nerve in recessus utriculi. 11. Facial nerve. 12. Lagena cochleæ. 13. Nerve of cochlea within spiral lamina. 14. Basilar membrane. 15. Nerve fibers to macula of saccule. 16. Nerve to ampulla of posterior canal. 17. Saccule. 18. Secondary membrane of tympanum. 19. Canalis reuniens. 20. Vestibular end of ductus cochlearis. 23. Section of the facial and acoustic nerves within internal acoustic meatus (the separation between them is not apparent in the section).
Figure 927 - Transverse section of a human semicircular canal and duct .
Figure 928 - Diagrammatic longitudinal section of the cochlea.
Figure 929 - Floor of ductus cochlearis.
Figure 930 - Limbus laminæ spiralis and membrana basilaris. 1, 1’. Upper and lower lamellæ of the lamina spiralis ossea. 2. Limbus laminæ spiralis, with a, the teeth of the first row; b, b’, the auditory teeth of the other rows; c, c’, the interdental grooves and the cells which are lodged in them. 3. Sulcus spiralis internus, with 3’, its labium vestibulare, and 3”, its labium tympanicum. 4. Foramina nervosa, giving passage to the nerves from the ganglion spirale or ganglion of Corti. 5. Vas spirale. 6. Zona arcuata, and 6’, zona pectinata of the basilar membrane, with a, its hyaline layer, B, its connective-tissue layer. 7. Arch of spiral organ, with 7’, its inner rod, and 7”, its outer rod. 8. Feet of the internal rods, from which the cells are removed. 9. Feet of the external rods. 10. Vestibular membrane, at its origin.
Figure 931 - Section through the spiral organ of Corti.
Figure 932 - The lamina reticularis and subjacent structures. Internal rod of Corti, with a, its plate. B. External rod (in yellow). C. Tunnel of Corti. D. Membrana basilaris. E. Inner hair cells. 1, 1’. Internal and external borders of the membrana reticularis. 2, 2’, 2”. The three rows of circular holes (in blue). 3. First row of phalanges (in yellow). 4, 4’, 4”. Second, third, and fourth rows of phalanges (in red). 6, 6’, 6”. The three rows of outer hair cells (in blue). 7, 7’, 7”. Cells of Deiters. 8. Cells of Hensen and Claudius.
Figure 933 - Part of the cochlear division of the acoustic nerve, highly magnified.
Figure 934 - End-bulb of Krause.
Figure 935 - Pacinian corpuscle, with its system of capsules and central cavity. a. Arterial twig, ending in capillaries, which form loops in some of the intercapsular spaces, and one penetrates to the central capsule. b. The fibrous tissue of the stalk. n. Nerve tube advancing to the central capsule, there losing its white matter, and stretching along the axis to the opposite end, where it ends by a tuberculated enlargement.
Figure 936 - Papilla of the hand, treated with acetic acid. Magnified 350 times. A. Side view of a papilla of the hand. a. Cortical layer. b. Tactile corpuscle. c. Small nerve of the papilla, with neurolemma. d. Its two nervous fibers running with spiral coils around the tactile corpuscle. e. Apparent termination of one of these fibers. B. A tactile papilla seen from above so as to show its transverse section. a. Cortical layer. b. Nerve fiber. c. Outer layer of the tactile body, with nuclei. d. Clear interior substance.
Figure 937 - Nerve ending of Ruffini.
Figure 938 - Organ of Golgi from the human tendo calcaneus.
Figure 939 - Middle third of a terminal plaque in the muscle spindle of an adult cat.