THE EVIDENCE OF THE ORGANS OF VISION 95 
(3) Optic fibre layer. 
(4) Thick inner nuclear layer. 
(5) Peculiar double-layered ganglionic layer. 
(6) External molecular layer. 
(7) External nuclear layer. 
(8) Membrana limitans externa. 
(9) Layer of rods. 
(10) Pigment-epithelium. 
He points out especially the peculiarity of layer (2) (2, Fig. 41), the 
inner molecular, in which two rows of nuclei are arranged with great 
Fic. 41,—Retina anp Optic Nerve or Prerromyzon. (After MULLER anp 
LANGERHANS.) 
On the left side the Miillerian fibres and pigment-epithelium are represented alone. 
The retina is divided into an epithelial part, C (the layer of visual rod-cells), and 
a neurodermal or cerebral part which is formed of, A, the ganglion of the optic 
nerve and, B, the ganglion of the retina. 1, int. limiting membrane; 2, int. 
molecular layer with its two layers of cells; 3, layer of optic nerve fibres; 4, int, 
nuclear layer; 5, double row of tangential fulcrum cells; 6, layer of terminal 
retinal fibres; 7, ext. nuclear layer; 8, ext. limiting membrane; 9, layer of 
rods; 10, layer of pigment-epithelium. D, axial cell layer (Axenstrang) in optic 
nerve. The layer 6 is drawn rather too thick. ~ 
regularity, the one row closely touching the membrana limitans 
interna, the other at the inner boundary of the middle third of the 
