Slonaker, Eye of the Mole. 365 



nerve («. op.). A peculiar arrangement of the lens is seen in that the cells {Ic.) 

 only partly fill the lens capsule (/. cp.). X 29. 



Fig. 10. Vertical section of the left eye of the same animal as Fig. 9. 

 Eye hardened in the same manner. The same characteristics are seen in the 

 lens. X 29. 



Fig. II. Vertical section through the center of the lens of an adult eye 

 hardened in lOf;^ nitric acid. It shows the characteristic folding and wrinkling 

 due to this reagent. X 29. 



Fig. 12. Horizontal section through the center of the right eye of the 

 same adult as shown in Fig. ii and hardened in the same manner. X 29. 



^^S- ^3- Horizontal section through the center of adult eye hardened in 

 Perenyi's fluid. It shows all the structures of the eye to be almost normal. 

 X 29. 



Fig. j^. Vertical section through the center of the lens of an adult eye 

 hardened in Perenyi's fluid. Shows the complete absence of aqueous and 

 Titreous chambers. X 29. 



Fig. 75. Horizontal section through the center of lens of adult eye 

 hardened by 10^ formalin in the skin. Shows a peculiar shape of the 

 lens. X 29. 



Fig. 16. Horizontal section of same eye as Fig. 15, passing through the 

 center of the eye cleft, but not through the center of the eye. In Figs. 15 and 

 16 the retina is seen to have separated from the pigment layer due to the action 

 of the hardening fluid. X 2g. 



Fig. ly. Horizonal section through the center of the eye cleft of adult 

 eye hardened in the skin by 10^ formalin. Section passes tangential to the 

 eye ball, X 29. 



Fig. 18. Horizontal section through the center of the lens of the same 

 adult eye as Fig. 17. Shows a very much reduced lens. X 29. 



Fig. ig. Horizontal section through the center of the lens and optic 

 nerve of an adult eye hardened in Perenyi's fluid. The lens shows almost 

 double, the two parts united by only a small part of the lens tissue. X 29. 



Fig. 20. The lens from Fig. 19 magnified to show the cells. Typical 

 lens-like cells are seen passing from the posterior part to the anterior and thus 

 connecting them. The remaining cells have the peculiar cartilage-like appear- 

 ance. X 65. 



Fig. 21. Outline of the lens from the opposite eye of the same adult as 

 Fig. 19. The same peculiarity is again seen as in Fig. 20. "«"-":«■" marks 

 the position of the axis of the eye. X 65. 



Fig. 22. The lens from Fig. 6 magnified to show the character of the 

 cells (/<:.) at birth. They present the same characteristic cartilage-like appear- 

 ance as seen in Fig. 20. A-x marks the axis of vision and the arrow points 

 anteriorly. A layer of cells one cell deep (/) can be distinguished covering the 

 anterior part of the lens. The cells in the remainder of the lens (2), only a 

 part of them being drawn, show no definite arrangement, x 115. 



PLATE III. 



^*S- ^3- Horizontal section through the center of the lens and exit of 

 the optic nerve of the adult eye. The almost spherical lens is seen, also two 



