CHAP, ix.] 



OF THE SENSE OF SIGHT. 



427 



Fio. 83. 



A, Elements of the retitia. The trellis, isolated, of the supporting fibres : a, membrane, i 

 tremely fine, which separates the bacillated layer from the other layers ; e, vertical suppc 

 ing fibres, with lateral prolongations and intercalated nuclei (cO visible especially in 1 



, ex- 

 Sport- 

 ing fibres, with lateral* prolongations and intercalated nuclei (cf) visible especially in the 

 median layers ; d, intermediary layer ; g, molecular layer ; t, internal limiting membrane, 

 where the supporting fibres have their origin. 



B, The nervous elements, isolated, of the retina : Z>, bacilla -vrith external granules (?/) ; c. 

 cones with their granules (cO ; d, intermediary layer with fibrils extremely fine ; /, layer 

 with internal granules ; g, trellis of nervous fibres, very fine, in the molecular layer ; h, 

 ganglionary cells ; h', nervous fibres which proceed thereto ; i, fibres of the optic nerve. 



