194 THOMPSON YATES LABORATORIES REPORT 
Fig. 33 Hen. Transverse section through hemisphere and optic thalamus. Removal of one hemisphere. 
Marchi stain. 
A. Tr. septo-mesencephalicus. B. IS C. Tr. striothalamicus and Tr. striomesencephalicus. 
E. Tr. occipito-mesencephalicus. 0/>. tr. Optic tract. Op. ch. Optic chiasma. C.pl. 
Commissure anterior and posterior pallii. A.C. Anterior commissure. 
Fig. 34 Hen. Transverse section through hemispheres and optic thalamus. Removal of one hemisphere. 
Marchi stain. 
Letters as in above. 
Fig. 35 Hen. Transverse section through hemispheres and optic thalamus. Removal of one hemisphere. 
Marchi stain. 
Letters as above. 
Fig. 36 Hen. Transverse section through hemisphere and optic thalamus. Removal of one hemisphere. 
Marchi stain. 
Letters as above. 
Fig. 37 Hen. Transverse section through hemispheres and optic thalamus. Removal of one hemisphere. 
Marchi stsin. 
Letters as above. 
Fig. 38 Hen. Transverse section behind level of preceding, showing termination of degenerated tracts 
after removal of one hemisphere. Marchi stain. 
Letters as above. 
Fig. 39 Hen. Transverse section through mesencephalon, showing termination of degenerated tract 
after removal of one hemisphere. 
C Tr. striomesencephalicus. G. Tr. mesencephalicus striatus (undegenerated). P.C. 
Posterior commissure. 
Plate IX. Figs. 40-50 
Fig. 4.0 Hen. Transverse section through hemispheres and optic thalamus, showing ascending degen- 
eration after lesion of the right optic lobe. Marchi fluid. 
A. Tr. septo-mesencephalicus. B. i£ C. Tr. striothalamicus and Tr. striomesence- 
phalicus. Op. md. Median optic bundle. G. Tr. mesencephalicus striatus. A.C. 
Anterior commissure. Gd. Gudden's commissure. 
Fig. 41 Hen. Transverse section through mesencephalon. Lesion of the right optic lobe slightly below 
this level. Marchi stain. 
Op.md. Median optic bundle. G. Tr. mesencephalicus striatus. ant. lat. Antero-lateral 
columnar fibres degenerating in a descending direction. Lm.cm.ms. Lamina commissuralis 
mesencephali, showing the cells of stieda. 
Fig. 42 Hen. Transverse section through mesencephalon. Lesion of right optic lobe just behind this 
level. Marchi stain. 
Letters as in preceding figure. P.C. Posterior commissure. 
Fig. 43 Hen. Transverse section through mesencephalon. Lesion of right optic lobe. Resulting 
ascending and descending degenerations. 
Letters as in preceding figures. 
Fig. 44 Hen. Section through mesencephalon, showing resulting degenerations after lesion of the 
mesencephalon. Marchi stain. 
Op.md. Median optic bundle. G. Tr. mesencephalicus striatus. Op.tr. Optic tract. Dec. 
Decussating fibres. 
Fig. 45 Hen. Transverse section through cerebellum, optic lobe, and pons. Lesion at level of section. 
Resulting degenerations. Marchi stain. 
Letters as above. 
Fig. 46 Hen. Transverse section through cerebellum and pons. Lesion in the neighbourhood. Re- 
sulting degenerations. Marchi stain. 
Dec^. Dorsal decussation. Dec^. Ventral decussation. Vm. Radix trigemini. 
