72 



Anatomy of the Rabbit. 



slender funnel-like structure, the infundibulum, the tip of the 

 latter being in contact with the pituitary body or hypophysis and 

 its base connected with a small grey elevation, the tuber cinereuni. 



Fig. 39. Plan of the divisions of the vertebrate brain: A, embryonic; B, 

 adult, projection from dorsal surface; C, adult, sagittal section. The contour 

 of the mammalian brain is indicated by broken lines. 



Primary divisions — PR, prosencephalon; T,, telencephalon; DI, dienc^p- 

 halon; MS, mesencephalon; ,RH, rhombencephalon; MT, metencephaloji; 

 MY.'myelencephalon; S, spinal cord. 



a.c, cerebral aqueduct; b.o., olfactory bulb; c, corpora quadrigemina ; 

 cb., cerebellum; cm., mamillary body; c.o., optic chiasma; c.p., pineal body; 

 f.i., interventricular foramen; h., hypophysis; h.c, cerebral hemisphere; in., 

 infundibulum; l.t., lamina terminalis; p., pons; pi., chorioid plexus of third 

 ventricle; p.c, cerebral peduncle; t., thalamus, also indicates position of massa 

 intermedia; v.l., lateral ventricle; v.m.p,, posterior medullary velum; v.q., 

 fourth ventricle. 



Its cavity is the recesS'US infundibuli.^ Immediately in front of 

 the infundibulum the ventral portions of the optic tracts join to 

 form the optic chiasma, and immediately behind it the floor is 



