THE RETINA 



421 



real nature of the several structures which give to each 

 layer its characteristic appearance. Still less does it give 

 any clue to the nature of the connections of the successive 



Fig. 137. — Diagram iJf Illustration of the Nervous Structure of the 

 Retina. 



/ — VII, the sever.ll "layers" of the retina. 

 r.o, r.i, outer and inner limbs of a rod ; r.f, rod fibre ; r.n, rod nucleus ; 

 r.b.p, rod bipolar cell ; c.o, c.i, outer and inner limbs of a cone ; c.f, cone 

 fibre: c.n, cone nucleus ; c.b.p, cone bipolar cell; g.c, ^.c, two cells of the 

 ganglionic cell layer ; op.f, op.t, fibres of optic nerve. 



layers with each other by which the functional continuity 

 of the rods and cones with the fibres of the optic nerve 

 is brought about. But by the application of very special 



