41 



SCYLLIUM 



g. Dorsal view of brain and spinal cord : olfactory lobes ; cerebrum ; thalamencephalon ; optic lobes ; cerebellum ; 

 medulla oblongata; restiform tracts; fourth ventricle; spinal cord; roots of cranial nerves n, in, iv, v, vn, vin, 

 ix and x; spinal nerves. 



u 



10. Glossopharyngeal (ix) and vagus (x) nerves as seen after slicing horizontally through the auditory capsule 

 until the nerves are exposed and then slitting open the anterior cardinal sinus : root of ix ; branches of ix to hyoid 

 and first branchial arches ; root of x ; branches of x to lateral line, to branchial arches i to 5, to heart and viscera ; 

 gill pouches. 



