258 TWENTY-FO UR TH LECTURE. 



filament simply bends into another plane, suddenly and at 

 a considerable angle. I have convinced myself of this with 

 certainty. 



The broad cone fibres divide at the same place into three 

 very fine processes (above d). 



In the most delicate connective-tissue frame-work of the 

 intergranular layer we meet with a confused mass of fine 

 horizontally and obliquely disposed filaments (d), the con- 

 tinuations of the rod and cone fibrillar. 



The inner granular layer — the stratum granulosum inter- 

 num — contains, in the first place, as we already know (A, e'), 

 connective-tissue nuclei or cellules of oval shape. Together 

 with these appear layers of sharply demarcated, globular, nu- 

 cleated cells (B,f), into the upper pole of which sinks a 

 rather fine nervous filament, to again pass out at the lower 

 pole, very much finer, and continuing further in a perpen- 

 dicular direction. These nervous granules do not show any 

 transverse striation. 



The molecular or fine granular layer, stratum moleculare 

 (B, g), repeats, although with greater thickness, the fine con- 

 nective-tissue spongy structure of the stratum intergranulo- 

 sum. We again discover in it a confused mass of primitive 

 fibrillar. Ascending fibres from the more deeply situated 

 cells of the intergranular layer, having entered this confused 

 mass, may be observed here and there ; following their course 

 is not to be thought of. We have here, therefore, a new de- 

 fect in our knowledge of the retina. 



We now arrive at the layer of the ganglion bodies, the 

 stratum cellulosum (B, Ji), These occur stratified (in IO to 6 

 layers) at the bottom of the retina, to gradually appear to- 

 wards the periphery as a single layer, and with an increasing 

 distance from each other. With the exception of the macula 

 lutea, where the ganglion bodies are bipolar, they form fine 

 multipolar cells of not inconsiderable size (up to 0.0377 nim.). 

 Their protoplasma processes turn outwards, and finally disap- 

 pear with their terminal branches in the maze of fibres of the 

 molecular stratum ; their axis-cylinder process is directed in- 



