io8 



UNIVERSITY OF COLORADO STUDIES 



Description of Figures 



Figs. 1-9 are from cross-sections of the brain in order from before backward. 

 Thev are not cut directly across the brain, so that the two sides are somewhat different. 

 Magnification X 25. 



Figs, i, 2. — Through the olfactory lobes. 



Figs. 3, 4. — Through the cerebral hemispheres. 



Fig. 5. — Through the cerebral hemispheres and the diencephalon. 



Fig. 6. — Through the diencephalon. 



Fig. 7. — Through the mesencephalon, showing the brain in place in the cranium. 



Fig. 8. — Through the medulla at origin of the auditory nerve. 



Fig. 9. — Through the spinal cord just back of the medulla. 



Figs. 10 and 16 are from sagittal sections. Magnification X 12. Fig. 10 shows 

 the parts of the brain as they would appear in a median sagittal section. This draw- 

 ing was made by comparison of a number of sections from different brains. Fig. 16 

 is from a nearly sagittal section a little to one side of the median line. This shows 

 especially the relation of the fibers of the corpus callosum to the interventricular 

 foramen. 



Figs. 11-15 are from frontal sections in order, from the dorsal toward the ventral 

 side of the brain. Magnification X 12. The sections are cut a little lower on one 

 side than the other. They give a good idea of the size and arrangement of the ven- 

 tricles of the brain. 



Fig. 17 is a dorsal view of the entire brain, X12. 



Reference Letters 



I-X, the cranial nerves. 



Ah., Ammon's horn. 



ant. com., anterior commissure. 



bpt., basal prosencephalic tract. 



cal., corpus callosum. 



ch. pi., choroid plexus. 



cord, spinal cord. 



dien., diencephalon. 



Gg., Gasserian ganglion. 



go., olfactory glome rules. 



hyp., hypophysis. 



int. f., interventricular foramen. 



inf., infundibulum. 



lam. t., lamina terminalis. 



Mb., ISIeynert's bundle. 



med., medulla oblongata. 



mesen., mesencephalon. 



meten., metencephalon. 



Mf., Mauthner's fibers. 



o. ch., optic chiasma. 



of., optic fibers. 



pb., pineal body. 



p. com., posterior commissure. 



plf., posterior longitudinal fasciculus. 



pr., preoptic rece.ss. 



rhinen., rhinencephalon. 



spcom., supracommissure. 



striat., corpora striata. 



telen., telencephalon. 



V. lat., lateral ventricle. 



v. 3, third ventricle. 



V. 4, fourth ventricle. 



