KEY TO DESCRIPTION OF PLATES AND TEXT FIGURES. 



1. Pigment epithelium. 



pi. Densest pigmented section of the pigment epithe- 

 lium, just below the nucleus. 



2. Rods and cones. 



3. Outer nuclear layer. 



4. Outer reticular layer. 



5. Horizontal cells. 



6. Inner nuclear layer. 



7. Spongioblast^ layer. 



8. Inner reticular layer. 



9. Ganglionic layer. 

 10. Optic-fiber layer. 



a. 0. Ophthalmic artery. 



am. Ameloid bodies of the pigment epithelium. 



k Brille. 



bac. Rod. 



ci. p. Ciliary process. 



cj. Conjunctiva. 



cj. s. Conjunctival sac. 



chr. Or chti. Choroid. 



chr. I. Choroidal lymph. 



chr.f. Choroidal fissure. 



en. Cones. 



en. nl. Cone nuclei. 



cor. or cm. Cornea. 



cps. or cpl. sng. Blood-corpuscles in normal vessels. 



cps. s. Stagnant blood-corpuscles. 



d. Dorsal aspect of eye. 

 dr. Dermis. 



e. m. End member of cone. 

 F. cj. Fornix conjunctiva. 

 fr. ol. Olfactory pit. 



hd. or hyl. Hyaloid membrane. 



H.gl. Harder's gland. 



i. Iris. 



i. 1. Outer layer of iris. 



i. 2. Inner layer of iris. 



i. c. Interpolated cells. 



/. Left side of eye. 



/.', I. 2 , I? First, second, and third labial scale.] 



Ins. or /. Lens. 



/. c. Lens capsule. 



M. Mullerian nuclei. 



>//. //i. Middle member of cone. 



msc. or mil. Eye muscle. 



nl. Nucleus. 



nl. con. Cone nuclei. 



nl. f. Nuclear fragments. 



nl. g. Nuclei of the ganglionic cells. 



nl. I. or nl. 1 Elongate nuclei of the pars ciliaris. 



nl. A/uel. Mullerian nuclei. 



n. op. Optic nerve. 



«. s. Nasal scale. 



oc. Eye. 



0. c. Ocular scale. 



o.f. Orbital fat. 



0. s. Ocular scale. 



01. Otolith. 

 /. Pupil. 



/. i. Palpabra inferior. 



p. s. Palpabra superior. 



/;'. s. Pigment appearing in optic cavity with senes- 

 cence. 



pi. spit. Pigment spheres. 



/. /. Pigment layer. 



po. s. Preocular scale. 



pr. nl. Processes of the cone nuclei. 



pupl. Pupil. 



r. Right side or retina. 



r. or rt. Retina. 



ro. Rostral. 



scl. Sclera. 



scl. c. Scleral cartilage. 



subo. or sb. orb. Suborbital. 



v. Ventral aspect. 



vit. Vitreous body. 



x. Flattened cells beneath pigmented layer, of doubt- 

 ful significance. 



y. Flattened cells beneath inner nuclear layer, of 

 doubtful significance. 



VI 



