S4 



FREDERICK TILXEY AND LUTHER F. WAKRKX 



of the pineal organ the ptUnmln. Histologically the pellucida 

 is, according to Ahlborn- made up of cells of considerable size 

 together with connective tissue. Owsiannikow- '" found both 

 libers and small cells. Whit well 4 - 1 and Beard 1 s in 1888 found 



f-T /--r'. ''' (->'"' 



" ' 





.<J\i1 



I 1 ij:. 1 7 IJi-l in:i :ind pclluciiln of the pinciil orjiau in :i l'ull-m-n\\ n I'ct roiny/mi 

 iii.-iriiius, :icc(,riliiiu to St udnicka, 1899. 

 /' //., |n-lliicitl:i : l\i t., retina. 



thai the pellucida consisted of cylindrical cells. ( iaskell 11 '" 1 in 

 ls ( . )() observed cylindrical and small cells, and St udnicka 388 as 

 well as Rct/ius :;i " found tli.-it (lie structure was made up almost 

 exclusively of l.-irge cylindrical cells. 



