766 MR. A. SANDERS ON THE ANATOMY OF THE CENTRAL NERVOUS SYSTEM, &a. 
PLATE 39. 
Fig. 11. Transverse section through the fourth ventricle at the posterior end of the 
cerebellum. Rliina. X 22. 
Fig 12. Transverse section through the roots of the Acusticus. Raja Batis. X 22. 
Fig. 13. Transverse section through the Crura cerebelli ad medullam. Rliina. X 22. 
Fig. 14. Transverse section through the valvula cerebelli and the trochlear nerves, 
at the transition of the fourth ventricle with the aqueduct of Sylvius. 
Acanthias. X 22. 
PLATE 40. 
Fig. 15. Transverse section through the region of the oculomotorius nerve. Acanthias. 
X 22. 
Fig. 16. Transverse section through the anterior end of the optic lobe and the 
posterior commissure. Acanthias. X 12^. 
Fig. 17. Longitudinal section through the cerebellum. Scyllium. X 7. 
Fig. 18. Longitudinal section through the mesencephalon and the third ventricle. 
Raja. 
PLATE 41. 
Fig. 19. Horizontal section through the third ventricle and the base of the cerebrum. 
Acanthias. X 12|. 
Fig. 20. Transverse section through part of the granular layer of the cerebellum. 
Acanthias. X 450. 
Fig. 21. Section through part of the molecular layer of the cerebellum. Scyllium. 
X 450. 
Fig. 22. Longitudinal section through part of the optic lobe. The section was 
composed from two separate pieces. Rhina. X 65. 
Fig. 23. A glomerulus olfactorius and the adjacent part of the internal layer. Acan¬ 
thias. X 325. 
