x LIST OF ILLUSTRATIONS 



FIG. PAGE 



34. THE BUND SPOT - ... 394 



35. AN OPTICAL ILLUSION - 398 



36. AN OPTICAL ILLUSION - 401 



37. AN OPTICAL ILLUSION - 402 



38. EXTERNAL, MIDDLE, AND INNER EAR - 411 



39. THE COCHLEA - 414 



40. THE ORGAN OF CORTI - 415 



41. NERVES OF THE CORNEAL EPITHELIUM - - 424 



42. TOUCH-CORPUSCLES - - 427 



43. PACINIAN CORPUSCLE - 428 



44. THE GLOTTIS - 432 



45. THE LARYNX IN LONGITUDINAL SECTION - - 433 



46. THE LARYNX FROM THE EIGHT SIDE .... 435 



NOTE ON THE FRONTISPIECE 



FOUR photomicrographs of cells or parts of cells of brain- tissue, coloured 

 by the chrome-silver method (cf. p. 293). 



A. Cell of Purkinje from the cerebellum of a man aged 45. At the 

 bottom of the photograph is seen the rounded cell-body, with the 

 commencement of its axon. The summit of the cell-body bears an 

 elaborately branched system of dendrites, spread out in the plane of 

 the section. 



B. A single basket-cell of the cortex of the cerebellum (very highly 

 magnified). The oval cell-body gives origin to four dendritic pro- 

 cesses which branch. Thorns are to be seen on the larger process which 

 ascends on the right. From the same process, near its origin, springs 

 a delicate axon which thickens as it proceeds to form a basket at the 

 right-hand lower corner of the photograph. Two other branches of 

 the same axon, which form baskets around other Purkinje-cells, are 

 faintly visible, although out of focus. 



C. Seven or eight pyramids from the cortex cf the cerebrum of a 

 hedgehog. A little below the centre of the photograph is seen a large 

 pyramid with a single thorny apical process which bifurcates, several 

 basal dendrites and an axon. In the upper part of the photograph 

 are seen the apical processes of a number of pyramids of which the 

 bodies were not included in the section. 



D. The margin of the cortex (subiculum cornu Ammonis) from the 

 same specimen. A single row of pyramids extends across the photograph. 

 They are remarkable for the richness of branching of their basal pro- 

 cesses, which has earned for the cells which comprise this sheet the 

 name of " double pyramids." 



All four sections were cut vertically to the surface. 



