30 THE EMBRYOLOGY OF THE EYE. 



Structure, and a few nuclei or round cells are 

 seen in it, and also on and often apparently in 

 the membrane of the pars ciliaris. The ciliary 

 body at this period and later is adherent to the 

 lens-capsule, and when the two are forcibly 

 torn apart the membrane sometimes becomes 

 detached from the pars ciliaris, and a continu- 

 ous membrane with nuclei lying on it may then 

 be seen extending from the ciliary body to the 

 lens-capsule. This has often been mistaken 

 for the zonula. 



The vessels of the lens-sheath begin to 

 atrophy at this stage. At times, when the 

 ciliary body is torn away from the lens, long 

 spindle-cells (which may be atrophic vessel- 

 walls, since earlier no spindle-cells are found 

 in the lens-sheath) run from the lens to the 

 ciliary body. Later, when the vitreous-vessels 

 have disappeared, the vitreous is here very 

 fibrillar, and is adherent to the limitans interna 

 just anterior to the ora serrata. Thick bundles 

 of vitreous-fibrillae, often wavy, run in a curved 

 line from the ciliary body to the equator of the 



