THE EYE. 247 



sebaceous glands are not connected with hair-fol- 

 licles. 



The skin of the eyelid is somewhat thinner than 

 that of the face, is beset with delicate hairs, and 

 supplied with sweat-glands and sebaceous follicles. 

 It passes over on to the edge of the lids, at the in- 

 ner border of which it becomes continuous with the 

 mucous membrane. The eyelashes are inserted 

 obliquely into the edge of the lid, in from two to 

 four rows ; and the follicles, which are quite deep, 

 are furnished with sebaceous glands. 



The conjunctival mucous membrane of the lids 

 consists of a basis substance of loose fibrillar connec- 

 tive tissue containing a few elastic- fibres and numer- 

 ous small spheroidal and branching cells. The 

 epithelium is laminated, consisting of a deep layer 

 of polyhedral cells, then more superficially of more 

 or less columnar cells. 



The epithelium of the bulbar conjunctiva ap- 

 proaches more and more closely in structure that of 

 the cornea, as we pass from the lid over toward the 

 sclero-corneal junction. 



Small racemose glands, called accessory tear-glands, 

 are often seen opening on the surface of the 

 mucous membrane. In addition to the striated 

 muscular bundles of the obicularis, smooth muscle- 

 cells, forming a membranous layer, occur be- 

 neath the conjunctiva on the orbital portion of 

 the lids. 



