MANUAL OF ZOOLOGY 



or trochlear (path), and the sixth, or abducent, go to the 

 muscles of the eye; the fifth, or trigeminal (oph. V, nix. V, 

 mnd. V), to the snout and jaws; the seventh, or facial (oph. 



■hum.rtd.JSf 



sp- co lal. vclo 



Fig. 228. — Scyllium catulus. Dissection of the brain and spinal nerves from the 

 dorsal surface. The right eye has been removed. The cut surfaces of the 

 cartilaginous skull and spinal column are dotted. The ophthalmicus profundus 

 and the buccal branch of the facial are not represented, cl. l-cl. 5, branchial 

 clefts; ep, epiphysis; ext. red, external rectus muscle of the eye-ball; gl. pk, 

 glossopharyngeal; hor. can, horizontal semicircular canal; hy. mnd. VII, byo- 

 mandibular portion of the facial; inf. obi, inferior oblique muscle; int. reel, 

 internal rectus muscle; lat. vag, lateral branch of vagus', m.r. V, maxillary 

 division of the trigeminal; olf. cps, olfactory capsule; elf. s, olfactory sac; 

 oph. !'. VIZ, superficial ophthalmic branches of trigeminal and facial; path, 

 fourth nerve; pi. I'll, palatine branch of facial; sp. co, spinal cord; spir, 

 spiracle; s. red, superior rectus muscle; s. obi, superior oblique; vag, vagus; 

 vest, vestibule. (From Marshall and Hurst.) 



VII, pi. VII, hy. mnd. VII), to the palate, lower jaw, and 

 hyoid arch; the ninth, or glossopharyngeal (gl.ph), to the 



