152 



VISION 



mm 



Figure 23 Transverse sections through the rostral hindbrain of Raja eglanteria. a, auricle; 

 al, anterior lobe of the cerebellum; all, lower leaf of the auricle; cc, cerebellar crest; en, 

 cerebellar nucleus; dn, dorsal nucleus of VIII; dt, descending trigeminal tract; dv, de- 

 scending trigeminal nucleus; lg, lateral granular layer; 11, lateral lemniscus; mg, medial 

 granular layer; mlf, medial longitudinal fasciculus; mr, trigeminal root; mrf, medial re- 

 ticular formation; mv, trigeminal motor nucleus; ni, nucleus intermedius of the posterior 

 lateral line lobe; pc, Purkinje cell layer; pi, posterior lobe of the cerebellum; pv, principal 

 trigeminal sensory nucleus; sr, superior raphe nucleus; srf, superior reticular formation; ul, 

 upper leaf of auricle; V, trigeminal root; vr, ventral ramus of anterior lateral-line nerve; X, 

 nucleus X of posterior lateral-line lobe; y, nucleus y (possible locus coerulus or primary 

 sensory neurons); Z, nucleus z (possible medial cerebellar nucleus or secondary gustatory 

 nucleus). 



