THE RABBIT. 379 



Monro ( 501, 507, 513), passes downwards and back- 

 wards, and ends in the corpus mammillare : it is best made 

 out in a fresh brain. 



LXV. In another brain make a longitudinal vertical 

 section of the whole organ, a very little to one 

 side say the left of the median line. Make 

 out, without further dissection, the relation of the 

 median ventricles, infundibulum, corpus callosum, 

 commissures of the third ventricle, &c. 

 LXVI. In a third thoroughly hardened brain make 

 a series of transverse sections, and note in them 

 the relations of the parts already seen by dissec- 

 tion. The sections should be taken through 

 (a). The anterior end of the corpus callosum and the 



septum lucidum. 

 (b). The anterior commissure. 

 (c). The foramen of Monro and optic chiasma. 

 (d). The middle commissure. 

 (e). The posterior commissure and infundibulum. 

 (/). The nates and corpus mammillare. 

 (g). The testes, valve of Vieussens, and pons Varolii. 

 (ti). The flocculi and hinder part of the medulla 

 oblongata. 



