350 



HUMAN ANATOMY. 



1. Mem'brana limitans interim, the most internal layer of the retina, 

 forms the base of the connective-tissue frame-work of the retina, from 

 which it is derived. 



2. The fibrous layer consists of nerve-fibres, the termination of the 

 optic nerve-fibres. 



Of 



FIG. 158. 



The structure of the human retina. I, pigment epithelium layer; 

 II, rods and cones; III, granules of the visual cells; IV, outer plexi- 

 form layer; V, layer of horizontal cells; VI, layer of bipolar cells; 

 VII, layer of amakrine cells; VIII, inner plexiform layer; IX, gan- 

 glion-cell layer; X, layer of nerve-fibres; 1, diffuse amakrine cell; 

 2, diffuse ganglion cell; 3, centrifugal nerve-fibre; 4, amakrine asso- 

 ciation fibres; 5, neuroglia-cells; 6, Muller's radial fibres. (After 

 Grecff.) (Ball.) 



