

Fig. 57 



A dissection of the brain, anterior part of the spinal cord, cranial, occipiLal, and 

 anterior spinal nerves of Scylli-uin canicula. 1-5, the five giil-sllts of the left 

 side ; ar^ anterior rectus muscle ; Br, brachial plexus ; C, ligamentous band 

 passing in front of the spiracle, and perforated by a mucous c^uial ; cb^ 

 cerebellum; cbh, cerebral hemispheres; Hy, hyomandibular cartilage ; /<?, 

 inferior oblique muscle ; Z., post-spiracular ligament ; Ln, lateral branch of 

 the vagus nerve; inb, mid-brain or corpora bigemina; o/, olfactory capsule; 

 pbr, 4th pharyngo-branchlal cartilage ; P^, cut end of pectoral girdle ; /r, 

 posterior rectus muscle ; //?', pretrematic branch, and fisir^ post-trematic 

 branch of a branchial nerve ; rb, restiform body ; rn, olfactory lobe (rhlnen- 

 cephalon); Sec, horizontal semicircular canal; so, superior oblique muscle 

 supplied by the fourth nerve; j/, spiracle; ^r, superior rectus muscle; 

 th^ thalamencephalon ; Vis, visceral branch of vagus nerve ; x-z, occipital 

 nerves ; //, optic nerve; ///, oculomotor nerve ; /'a, Vila, ophthalmic branches 

 cfsth and 7th nerves ; K(5, maxillary branch of 5th nerve ; Kc, mandibular branch 

 of 5th nerve ; P'llb, palatine branch of 7th nerve ; VIIc, post-spiracular 

 branch of 7th nerve ;- F///, auditory nerve ; IX, glossopharyngeal nerve ; A', 



Vagus nerve. Digitized by Microsoft® 



