THE NERVOUS SYSTEM OF THE OX 835 
The pons is smaller, both transversely and longitudinally, than that of the 
horse. It is strongly convex and has a distinct central depression. 
The 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 quadrigemina. ‘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 
Sissure bulb Frontal pole 
a 
Medulla oblongata 
Fic. 662.—Bratn or Ox; Dorsat View. 
Fissures: 1, Lateral; 2, suprasylvian; 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 
