XXXII.] 



THE EYE. 



36: 



elastic lamina, Bundles of fine fibrils the rami perforantes 

 perforate this membrane and spread out under the anterior epi- 

 thelium to form the sub-epithelial 

 plexus, from which fibrils proceed to 

 form a plexus of fine varicose fibrils 

 the epithelial plexus between the 

 epithelial cells, where they terminate 

 in fine points, forming no connection 

 with special end-organs (fig. 336). 



4. Cell-Spaces in the Cornea (Silver 

 Method) (L and H). Pith a frog, scrape 

 off the corneal epithelium, and rub the 

 surface of the cornea with solid silver 

 nitrate. After 20-30 minutes, excise 

 the cornea, mount it in glycerine, and 

 expose to light. 



(a.) The general substance of the 

 section is stained brown, and in it are 

 clear branching spaces, each one corresponding in shape to that of 



FIG 



337 Cornea of Frog with Cell- 

 Spaces, s Cell-spaces. Solid 

 silver nitrate, x 300. 



Sclerotic. 



Lam. supra-choroidea. 



Layer of large vessels. 



Z...^L.:_.~ .Limiting layer. 



-i^v'S .Chorio-capillaris. 



gnSr "Hyaline membrane. 



Pigment layer of retina. 



FlO. 338. V.S. Part of Sclerotic ami the Choroid. g. Large vessels; p. Pigment-cells; 

 c. T.S. of capillaries, x 100. 



a cornea corpuscle (fig. 337). The branches of adjoining spaces 

 anastomose, so as to form a system of juice-canals, not only with 

 32 



