420 



ELEMP:NTARY physiology less. 



Fiu. 130. — Diagrammatic Views of the Nervous (A) and the Con- 

 nective (B) Elements of the Retina, supposed to be separated 



FROM ONE another. 



A, the nervous structures — 6, the rods ; c , the cones ; b'.c', the granules 

 or nuclei of the outer layer, with which these are connected ; d.W, inter- 

 woven very delicate nervous fibres, from which fine nervous filaments, 

 bearing the inner granules or nuclei, /./', proceed towards the inner sur- 

 face ; ff.f/', the continuation of these fine nerves, which become convo- 

 luted and interwoven with the processes of the nerve cells h.k' ; i.i, the 

 expansion of the fibres of the optic nerve. B, the connective tissue — 

 a.a, external limiting membrane ; e.c, radial fibres passing to the internal 

 limiting membrane ; e'.e', nuclei ; d.d, the intergranular layer ; y.g, the 

 molecular layer ; I, the inner limiting membrane. 



(Magnified about 250 diameters.) 



