Chap. XXXIX.] 



THE RETINA. ~ 



309 



435. From this arrangement is excepted (a) the 

 papilla iiervi optici, (6) the macula lutea and fovea 

 ceii trails retinae, and (c) the ora serrata of the retina. 



(a) The papilla iiervi optici, or the blind spot of 



Fig. 158. Diagram of the Ner- 

 vous Elements of the Retina. 



Fig. 159. Diagram of the Connectire 

 Tissue Substance of the same. 



2, Nerve-fibres ; 3, ganglion cells; 4, inner molecular layer ; 5, inner nuclear 

 layer; ti, outer molecular layer; 7, outer nuclear layer: 8, the membrana 

 limitans externa ; 9, the rods and cones. (Max Schultze.) 



the retina, represents the entrance of the optic nerve- 

 fibres into the retina ; thence, as from a centro, 

 they spread out in a radiating direction into the 

 saucer-shaped retina, of which they form the internal 



