294 ELEMENTS OF HISTOLOGY. [Chap. xxxv. 



ficial plexus is densest at the limbus cornese, and they 

 are in direct connection with the interfascicular 

 lymph clefts, both of the sclerotic and cornea. In 

 the margin of the lid the superficial lymphatics of 

 the skin anastomose with those of the conjunc- 

 tiva. 



Lymph follicles occur in groups in the conjunctiva 

 of many mammals about the inner angle of the eye. 

 In the lower eyelid of cattle they are very con- 

 spicuous, and known as the glands of Bruch. They 

 are also well-marked in the third lid of many 

 mammals. 



According to Stieda and Morano, isolated lymph 

 follicles occur also in the human conjunctiva. 



406. The nerves are very numerous in the con- 

 junctiva ; they form plexuses of non-medullated fibres 

 underneath the epithelium. From these plexuses fine 

 fibrils pass into the epithelium of the surface, between 

 whose cells they terminate as a network (Helfreich, 

 Morano). End bulbs of Krause occur in great num- 

 bers in man and calf. They have been mentioned in 

 a former chapter. 



407. (2) The lachrymal glands are identical 

 in structure with the serous or true salivary 

 glands. The arrangement of the connective tissue 

 stroma, the nature and structure of the ducts espe- 

 cially of the intralobular ducts and alveoli, the dis- 

 tribution of blood-vessels and lymphatics, are exactly 

 the same as in the true salivary glands. Reichel 

 has found that the epithelial cells lining the 

 alveoli are well defined, conical or cylindrical, trans- 

 parent and slightly granular during rest ; but 

 during secretion they grow smaller, more opaque 

 and granular, their outlines not well defined, and 

 the nucleus becomes more spherical and placed more 

 centrally. 



408. In most mammals there is in the inner 



