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Development of the Organ of Hearing: Fig. 35. Diagrammatic Section through the Cephalic region of an embryo, showing the origin of the Auditory System | Fig. 36 A. Section of the External Auditory Meatus of the Adult |

Fig. 36 B. A Section of the External Auditory Meatus at Birth | Fig. 37. Showing the Tubercles which arise round the First Visceral Cleft to form the External Ear | Fig. 38. Showing the part of the Adult Ear formed by each Tubercle | Fig. 39. Showing the condition of the Auditory Organs in a 6th week human foetus | [[:File:Keith1902 fig040.jpg|Fig. 40. Showing the Cavities derived from the Inner Recess of the First Cleft| Fig. 41. The temporal bone at birth showing the formation of the Antrum between the Squamosal and Petro-mastoid | Fig. 42. A transverse section showing how the Walls of the Antrum are formed | Fig. 43. Showing the outer aspect of the Petro-mastoid at birth after the Squamosal is removed | Fig. 44. Diagram of the Membranous Labyrinth | Fig. 45. The Otocyst in an Embryo of five weeks | Fig. 46. Showing the Nerve Structures concerned in the Sense of Hearing | Figures