KXI'F.AXATIOX OF PLATES 



The figures of Plates 1 to 4 are photomicroKraiilis; tho fiRurcs of Plate 5 were 

 drawn with the aid of a camera luc-ida. 



AHBl{i;\ lATIONS 



bac, rod 

 con., cone 



con. ace, accessory cone 

 ell.hac, rod ellipsoid 

 ell.con., cone ellijisoid 

 glt.ol., oil globule 

 mb.lim.e.v., external liniil 

 my. bac, rod niyoid 



ineinl) 



my. con., cone niyoid 



pd.cl.pig., base of pigment cell 



pr.'^.d.'tl.bac., rod outer member 



pr.'^.chl.con., cone outer member 



rln., retina 



.■*(•/., sclera 



.<it.til.cx., external nuclear layer 



Kt.pig., pigment layer 



191 



