68 FERNANDUS PAYNE. 



EXPLANATION OF PLATE I. 



I, pigment layer; 2, cones ; 3, outer nuclear layer ; 4, outer reticular layer ; 6, 

 inner nuclear layer ; 8, inner reticular layer ; 9, ganglion cell layer ; 10, fiber layer ; 

 /.v/.f, lens; sc/., sclerotic; c/ir., choroid ; cor., cornea; sil.c., scleral cartilage; 

 n.op., optic nerve ; vit.c<n'., vitreous cavity ; con.cai 1 ., conjunctiva! cavity ; C., outer 

 covering of the eye; Jl/., Mullerian fiber; L., membrana limitans externa. 



FIGS. I, 2 and 5 were drawn from sections. One-twelfth objective and one-inch 

 eye-piece. 



FIGS. 4 and 6 are diagrammatic. 



FIG. I. Side view of the head. 



FIG. 2. Diagram of the eye showing the parts in their relation and the distance of 

 the eye beneath the. surface. 



FIG. 3. Horizontal section of the retina of Aniphisbictia punctate, showing the 

 different layers. 



I'p;. 4. Horizontal section of the retina of Anolis. 



FIG. 5. Diagram showing the comparative measurements of the retina in the 

 two eyes. 



