374 DEVELOPMENT OF OEOANS IN MAMMALIA. [CHAP. 



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flfLS 



Longitudinal Vertical Section through the Anterior 

 Part op the Brain of an Embryo Rabbit op pour 

 centimetres. (After Mihalkovics.) 



The section passes through, the median line so that the cere- 

 bral hemispheres are not cut ; their position is however indicated 

 in outline. 



apt. septum lucidum formed by the coalescence of the inner walls 

 of part of the cerebral hemispheres ; cma. anterior com- 

 missure ; frx. vertical pillars of the fornix ; cal. genu qf 

 corpus callosum ; trm,. lamina terminalis ; hins. cerebral 

 hemispheres ; olf. olfactory lobes ; ad. artery of corpus 

 callosum ; fnw. position of foramen of Monro ; chd 3. choroid 

 pleius of third ventricle ; pin. pineal gland ; c/mp. posterior 

 commissure ; hgm. lamina uniting the lobes of the mid- 

 brain ; ehm. optic chiasma ; hph. pituitary body ; inf. infun- 

 dibulum ; pns. pons Varohi ; p6k. cerebral peduncles ; agd. 

 iter a tertio ad quartum ventriculum. 



