360 ]I. M. BEliNAKD. 



Fig. 7. — From tlie retina of a plaice six inches long (Flemminp:). A 

 ganalionic nucleus with granular cytoplasm streaming from one side, and with 

 the threads of tlie iatra-iiuclcar network radiating outwards, some of them 

 going towards the nerves with beads upon them. 



Fig. 8. — From the human retina (Perrenyi). The deeply stained primitive 

 nerve-fibrils became faint before reaching the nuclei, but the connection can 

 be made out. All the filaments run from nucleus to nucleus. All the nuclei 

 here shown are devoid of granular cytoplasm. 



Figs. 9 — 11. — From the human retina (Perrenyi). 



Fig. 9 shows the connection between the nuclei and the primitive 

 nervefibrillaj. The distal connecting filaments apparently obscured by 

 granular cytoplasm. 



Fig. 10. — The granular cytoplasm is all on one side, and contains 

 " Nissl's Scliolleu " in obvious connection with the nucleus, but streaming 

 away distally; filaments from the nucleus plunge straight into the inner 

 reticular layer (cf. Fig. 15). 



Fig. 11. — Several of the nuclear filaments running to the nerve pass 

 through the granular cytoplasm, and are visible because dotted with 

 beads ; near the edge of the cytoplasm the beads become large shapeless 

 clumps. Note the contrast already shown in Figs. 8 and 9 between the 

 thick staining primitive nerve-fibrillse and the connecting filaments. 

 Fig. 12. — From the human retina (Perrenyi). A grou]) of "ganglionic" 

 nuclei joined together by filaments which are continuations of the intra- 

 nuclear networks; proxinially, the filaments run into the fibrils of the neive- 

 layer, 7i.L, which are shown cut either across or slightly obliquely. Three of 

 the nuclei have granular cytoplasm on their distal sides. The "Kissl's 

 Schollcn " are seen very clearly associated with the nuclear filaments, and 

 then appear comparable with such masses of extra-raiclear chromatin as are 

 shown in Figs. \% a, b, c. 



Fig. 13. — From the retina of a salamander (corrosive subl.l. Nuclei 

 joined by filaments which can only be seen by very careful focussing; \\\z 

 filaments i)ass through the syncytial strands, s.s., and are sometimes bent 

 where they go through. 



Fig, 14. — From the retina of a salamander, taken out of the body-cavity 

 of the mother (Flemming). The nuclei packed tightly together, and without 

 any cytoplasm, granular or syncytial, traceable between them. Tlie intra- 

 nuclear networks run into one another. 



Fig. 15. — From the retina of a young plaice two inches long (Flemming), 

 showing the inner reticular layer as a " Punktsubstanz " with a subtle radial 

 striation, clearly seen in this case to be due to nuclear filaments passing 

 through the layer and running into nuclei of the middle layer. 



Fig. 1G.— From the retina of a frog (boiling corrosive), showing the nuclei 



