THE EYE OP THE OS. 
227 
EXPLANATION OF PLATE XI. AND WOODCUTS. 
Fig. 1. The eye of the ox, seen laterally, the muscles having been removed. 
a, the pupil of the eye ; b to b, the cornea ; c, c, and d, ends of 
muscles ; e, blood-vessels entering the eye : c, d, and e, are on the 
sclerotic ; /, the optic nerve. 
Fig. 2. The same ; the cornea and sclerotic have been removed, a, the 
crystalline lens, seen through the pupil ; the band, c to c, is the 
ciliary ligament and muscle ; b, the iris ; e, the choroid, showing its 
vessels ; /, the optic nerve. 
Fig. 3. A diagrammatic section of the eye, enlarged, a, the cornea, con- 
sisting of anterior elastic lamina, cornea proper, and posterior 
elastic lamina ; b to b, by a, shows extent of cornea ; c, c, c, the 
sclerotic ; d, the anterior chamber of the eye ; e, the pupil ; /,/, the 
iris ; g, g, the ciliary processes ; h, h, ciliary ligament and muscle ; 
i, the crystalline lens, surrounded by its capsule, j ; h, k, the canal 
of Petit ; l shows the termination of the retina (the scarlet line) ; 
the black line between the retina and the sclerotic is the choroid ; the 
light line beyond the retina is the hyaloid membrane, which passes 
on to the lens ; m, the vitreous body ; n, the optic nerve ; o, the 
central artery of the retina. 
Fig. 4. Fibres of the sclerotica. 
Fig. 5. Epithelium of the choroid, a , from the dark part in front ; b, over 
the tapetum. 
Fig. 6. a , detached vesicles ; b, detached granules, from the retina. 
Fig. 7. Fibrous layer of retina ; a, a blood-vessel. 
Fig. 8. The iris, seen in front ; a, the pupil ; b, the iris. 
Fig. 9. The iris and ciliary processes, seen from behind ; a, the pupil ; b, the 
iris, partly hidden by c, the ciliary processes. 
Fig. 10. Transverse section of the cornea proper. 
Fig. 11. Section of anterior elastic lamina, a, cornea proper ; b, epithelium ; 
c, elastic lamina. 
Fig. 12. Jacob’s membrane, b, when seen from above ; a, appearance of 
detached particles. 
Fig. 13. Section of retina, a, Jacob’s membrane ; b, granular ; c, vesicular; 
d, fibrous layer : along the latter is seen passing a blood-vessel. 
Fig. 14. The crystalline lens, seen in front. 
Fig. 15. The lens, separating into three divisions, and showing its laminated 
structure. 
Fig. 16. Fibre of the crystalline lens (Todd and Bowman). 
Fig. 17. Diagram to show the inverted image produced on the retina; b, c, the 
optic axis. 
Figs. 4, 5, 6, 7, 10, 11, 12, and 13 are reduced from the microscopic appear- 
ances at 250 diameters, drawn by the camera lucida. 
