848 THE NERVOUS SYSTEM OF THE DOG 
fic. 677.—Baser or Brain or Dog, 
Longitudinal fissure 
Olfactory bulb 
Olfactory tract 
Sulcus rhinalis 
Optic nerve 
Optic chiasm 
Optic tract 
Fossa lateralis 
Piriform lobe 
Hypophysis 
Oculomotor nerve 
Trochlear nerve 
Trigeminal nerve ‘ 
Abducent nerve 
Corpus trapezoideum 
Facial nerve 
Acoustic nerve 
Flocculus Glosso-pharyngeal nerve 
Vagus nerve 
Chorioid plexus of fourth 
ventricle Accessory nerve | 
Spinal cord Median fissure — Pyramid | 
Fig. 678.—Key ro Fie. 677. 
