376 



HISTOLOGY. 



changes to that of the conjunctiva, which has several basal layers of cu- 

 boidal cells and a superficial layer of short columnar cells. The latter are 



Superior 



tarsal Radiations 



muscle. from the tendon Orbicularis 



Conjunctiva. . of the levator palpebrae. palpebrarum. Skin. 



Epithe 

 lium 



Arcus . . 

 tarseus 

 externus. 



... Oblique section 

 of a hair sheath. 



Cross section of the 

 bundles of the 



orbicularis 

 palpebrarum. 



Arcus tarseus. .. 



Part of a 



ciliary gland. 



Cilium. 



Posterior edge ** 

 of the lid. 



Musculus 

 ciliaris Riolani. 



FIG. 427. SAGITTAL SECTION OF THE UPPER LID OF A Six MONTHS' CHILD. The outlet of the tarsal 

 gland was not in the plane of section. X 15. 



covered by a thin cuticula, and goblet cells are found among them. The 

 transition from the superficial squamous cells to the columnar form may 



