DEVELOPMENT OF THE BRAIN. 



337 



FIG. 392. SAGITTAL SECTION OF THE BRAIN OF A THREE MONTHS' EMBRYO. (After His.) 

 cbl., Cerebellum; hem., hemisphere; hy., hypophysis (posterior lobe); isth., isthmus; med., medulla 

 oblongata; mes., mesencephalon ; ol. b., olfactory bulb; o. r., optic recess; p., pons; p. b., pineal 

 body; p. s., pars subthalamica ; th., thalamus. 



o.b. 



cbl. 



FIG- 393- MEDIAN SAGITTAL SECTION OP AN ADULT BRAIN. 



cbl., Cerebellum; c. c., corpus callosum; c. q., corpora quadrigemina; hy., posterior lobe of the hypoph- 

 ysis; med., medulla oblongata; o. b., olfactory bulb; o. r., optic recess; p., pons; p. b., pineal body; 

 p. s., pars subthalamica; th., thalamus. 



