620 THE A M ERIC A X XA ri'RAI. IS T [^'oL. XL 



of the limitino- nieiiihranes. Some ol' these nuclei, especially those 

 near the middle of tlie layer, eventually become supportincr cells or 

 fibers of Miiller. Hiis is well shown in Fig. 12. Up to the end 

 of the period of readjustment the chromatic substance of all retinal 



there is a sinulo laruo, ( irarh defined ( In <>man< n.a^^. Thi. ( on- 



dition a[)pear^ to l>c true ..t otln-r cmbrNonic ti.M-.c a^ uill be 



seen In the fi-ure, but it i. e.pecialK c\idcnt in thee elliptical 

 luiclei of the inner nuclear layer. 



