ELASMOBRANCH BRAIN ORGANIZATION 



141 



ACA BD 

 D CB D B DC ACBA 



alln pr 



ar pill 

 plln 



Figure 16 Dorsal view of the brain of Platyrhinoidis triseriata, the thornback skate (A) 

 and Raja eglanteria, the clearnose skate (B). a, auricle; alll, anterior lateral-line lobe; alln, 

 anterior lateral-line nerve; ar, anterior ramus of statoacoustic nerve; en, central nucleus; il, 

 inferior lobe of the hypothalamus; lp, lateral pallium; mln, mesencephalic lateralis nu- 

 cleus; ob, olfactory bulb; oe, olfactory epithelium; op, olfactory peduncle; ot, optic 

 tectum; pill, posterior lateral-line lobe; plln, posterior lateral-line nerve; pr, posterior 

 ramus of statoacoustic nerve; II, optic nerve; III, oculomotor nerve; IV, abducens nerve; 

 V, trigeminal nerve; VII, facial nerve; VIII, statoacoustic nerve; IX, glossopharyngeal 

 nerve; X, vagal nerve. 



