Explanation of Plates. 1 6 1 



Figs. 6, 7. — Cells of the auditory nucleus cut transversely (Fig. 6)- 

 and longitudinally (Fig 7). 



Fig. 8. — Portion of a horizontal section through the region of the 

 infundibulum, in tuber cinereum. 



Fig. 9. — A. portion of the optic nerves near the chiasm cut longi- 

 tudinally. 



Plate XV. 



Fig. 1. — Ganglion of raphe as seen in a section through the 

 peduncles of the cerebellum, a little posterior to the section 

 figured on Plate V., Fig. 5. y 2 in. obj. camera. Cf., Fig. 

 10, which shows three cells from same region as Fig. 5,. b, 

 Plate XL, and also drawn with y 2 in. obj. 



Fig. 2. — Portion of nucleus of auditory nerve (Cf. , Fig. 1, a, 

 Plate XIII. Cf. also, Fig. 3, Plate IX.). n. VIII. corre- 

 sponds with that represented at a. n. VIII is a more 

 lateral portion interstratified between fibre bands, and cor- 

 responds to b in the present figure. The apical processes 

 of the flask-cells a are continued into fibres to the raphe. 



Fig. 3. — Cells from the section figured Plate XIII., Fig. 2, b. (Cf. , 

 Fig. 8, Plate XIII.) Large switch-cells of anterior zone in a 

 section in about the region of the ninth nerve. 



Figs. 3, 4. — Longitudinal vertical sections through the prosenceph- 

 alon and diencephalon, Fig. 4 being farther from the median 

 line. On the same scale and for comparison with Figs. 4, 6, 

 8 and 9 of Plate IX., but from another specimen, p. f., 

 pyramidal fascicle ; p. f., upper longitudinal fascicle ; 0. tr , 

 optic tracts; c. g., corpus geniculatum ; t. t., taenia thalami ; 

 a. c, anterior commissure tract. 



Fig. 6.— Longitudinal section of olfactory bulb. 



Fig. 6 a. — The ganglion layer enlarged at the point a of the pre- 

 ceding figure. 



Fig. 7. — Section through the thalamus in front of the middle com- 

 missure, at the point where the taenia thalami cross from the 

 infero-basal region of the hemisphere to the sides of the 

 thalamus, ch., optic chiasm; /. /., peduncular fascicle: 

 t. th.. taenia thalami; c. g., corpus geniculatum. 



