Chap. XXXVIII.] 



THE LENS. 



35 



and unbranched pigmented and unpigmented connec- 

 tive-tissue cells. 



(4) The lamina vitrea ; and, finally, 



(5) The tapetum nigrum, or the pigmented epithe- 

 lium, which, however, is considered part of the 

 retina. In the region of the ora serrata of the 

 retina also i.e., next 



to the ciliary processes 

 this zone of the 

 choroidea is lined 

 with a layer of trans- 

 parent, columnar, 

 epitheloid cells, re- 

 presenting the pars 

 ciliaris retinae. 



428. The arterise 

 ciliares breves and recurrentes, situated in the outer 

 part of the choroidal tissue, form ultimately the dense 

 networks of capillaries for the chorio- capillaries. The 

 veins derived from this pass into the outer part of 

 the choroid, where they anastomose so as to form the 

 peculiar large veins, which are called the venaj 

 vorticosse. 



Fis 



. 155. Pigmented Connective Tissue 

 ells of the Choroid Coat. (Atlas.) 



CHAPTER XXXVIII. 



THE LENS AND VITREOUS BODY. 



429. (1) THE lens consists of a thick, firm, elastic 

 capsule and of the lens substance. The former shows 

 fine longitudinal striae, and diminishes in thickness 

 towards the posterior pole of the lens. The surface 

 of the capsule facing the anterior surface of the lens- 

 substance is lined with a single layer of polyhedral, 

 granular-looking, epithelial cells, each with a spherical 

 or oval nucleus. This epithelium stops as such at the 



