THE EYE. 263 



The conjunctiva presents a complete mucous membrane 

 over the posterior surface of the eyelids and the anterior sur- 

 face of the sclera ; only the stratified pavement epithelium 

 remains over the cornea, the mucous membrane having 

 become metamorphosed into corneal tissue. 



The conjunctival glands are of manifold species. In man 

 and in certain mammals we meet with small mucous glandules, 

 though the cells contain fat granules. Convoluted glands 

 (Fig. 119) occur at the periphery of the cornea in ruminating 

 animals (Meissner). Simple culs-de-sac have been recognized 

 in the hog, externally to the corneal periphery, towards the 

 outer canthus of the eye (Manz). In the tarsal border of the 

 human eye we meet with modified sudoriparous glands 

 (Waldeyer). 



Concerning the trachoma glands, we have already commu- 

 nicated all that was necessary (p. 113). In man there are 

 probably no true lymphoid follicles (Waldeyer). The ter- 

 minal bulbs of the conjunctiva have been mentioned at p. 

 209. 



The tear-gland, glandula lacrymalis, consists of an aggre- 

 gation of single racemose glands. We are not yet familiar 

 with the nerve terminations here. The efferent apparatus 

 presents differences of structure in its different portions. 

 We leave the description of them, like that of so many other 

 things, to more comprehensive text-books. 



