THE NERVOUS SYSTEM OF THE OX 



835 



The pons is smaller, both transversely and longitudinally, than that of the 

 norse it is strongly convex and has a distinct central depression. 



ihe cerebellum is smaller and more angular in form than in the horse. The 

 vermis is large and has a distinct depression on its anterior face for the posterior 

 corpora quadrigemma. The hemispheres are relatively small and are not clearly 

 divided into tabulations. The anterior peduncles are very short. 



The cerebral peduncles are short. A small eminence in the interpeduncular 



Longitudinal Olfactory 

 fissure bulb 



Frontal pole 



Transverse fissure 



Occipital pole 

 chellum 



Medulla oblongnta 



Fig. 662. — Brain of Ox; Dorsal View. 

 Fissures; 1, Lateral; S, suprasy 1 vian ; 3, coronal; 4. transverse; 5, marginal; 6, entomarginal ; 7, ectomarginal. 8, 



Marginal or sagittal pole. 



fossa is caused by the presence of the interpeduncular ganglion. The medial gen- 

 iculate body is prominent. The pineal body is long and fusiform, and is often 

 pigmented in spots. The third ventricle forms two considerable recesses in rela- 

 tion to the pineal body: one (R. pinealis) extends up into the body; the other 

 (R. suprapinealis) is a long tubular prolongation in front of it. 



The optic tracts cross the cerebral peduncles almost at a right angle. 



The hypophysis or pituitary, body is situated in a deep fossa and is surrounded 



