THE HUMAN BODY. 



plex ; although but ^ inch in thickness it presents ten dis- 

 tinct layers. 



FIG. 89. -A section through the retina from its anterior or inner surface, 1 

 in contact with the hyaloid membrane, to its outer, 10, in contact with the clio- 

 roid. I, internal limiting membrane; 2, nerve-fibre layer; 3, nerve-cell layer- 4 

 inner molecular layer; 5, inner granular layer; 6, outer molecular layer'- 7' 

 outer granular layer; 8, external limiting membrane: 9, rod and cone laver-'lO* 

 pigment-cell layer. 



Beginning (Fig. 89) on its front or inner side we find, 



