680 



CRANIAL NERVES OF CHIMJERA MONSTROSA. 



Sk 



I. 

 II. 



Sp.ni. 



S,,.d. 

 Sj,.F. 



IX. 



IX. 1. 



2 



„ 3. 



„ 4. 

 „ 5. 



„ 6. 



„ 9. 



„ 10. 



„ 11. 



„ 12. 



„ 13. 

 X. 1. 

 X. I 1 



Skull. 



Roots of anterior spinal nerves without 



dorsal roots passing through the cranium. 



Only one foramen shown. 

 First cranial spinal. 

 Second ,, ,, 



Brachial nerve. 



Dorsal branches of the cranial spinals. 

 Foramina by which portion of brachial nerve 



enters pectoral girdle (on inner surface of 



the pectoral girdle). 

 Root of glossopharyngeal. Note the two 



rootlets, its origin from under root of 



lateralis, and its separate foramen. 

 Dorsal branch of glossopharyngeal. 

 Prae-branchial. 

 Conspicuous branches of above to first denii- 



branch. 

 Post-branchial. 

 Accessory skeletal branch to anterior edge of 



first branchial arch. 

 Accessory skeletal branch to posterior edge 



of first branchial arch. 

 Branch of 6 to second demibranch. 





■Motor branches. 



Pharyngeal branches. 



Root and ganglion of vagus 1. 

 Prae-branchial. 



:i 



Branches of above to pharynx. 



Post-branchial. 



Branch of accessory skeletal XI s to fourth 

 demibranch. 



X.V Accessory skeletal branch to anterior edge 



of second branchial arch. 

 ,, 8 Accessory skeletal branch to posterior edge 



of second branchial arch. 



X. 2 

 X. 2 1 



X. 3. 



X. 3 1 



> Motor branches. 



Accessory visceral branch from prae-bran- 

 chial. 



Visceral proper. 



Branch of above to the levator of first 

 branchial arch. 



Other branch of above to pharynx. 



Root and ganglion of vagus 2. 



Dorsal branch. 



Prae-branchial. 



Post branchial. 



Accessory skeletal branch to posterior edge 

 of second branchial arch. 



Accessory skeletal branch to anterior edge 

 of third branchial arch. 



Accessory skeletal branch to posterior edge 

 of third branchial arch. 



Motor branch. 



Visceral proper. 



> Accessory visceral branches. 



Root and ganglion of vagus 3 (seen to be 

 underlying vagus 2). 

 Prae-branchial. 

 Post-branchial. 

 Accessory skeletal branch to posterior edge 



of fourth branchial arch. 

 Motor branch. 

 Visceral proper. 



} Accessory visceral branches. 



Fig. 3. The roots of the trigeminal and facial nerves of Chimcera monstrosa, seen from the left side. Cn. 

 cerebellum; C.R., corpora restif ormia ; Mo., medulla; VII. 1 , ventral root of superficial ophthalmic 

 (lateral lino system) ; 4, dorsal root of same ; 7, ganglion of same ; S.O. VII., superficial ophthalmic 

 (lateral line system) ; VII. 2 , root of buccal (lateral line system) ; B., buccal ; 5, nervous roof of 

 triangular space formed by the ophthalmic and buccal nerves; S, ganglion of buccal; VII. 3 , root 

 of hyomandibular trunk (facial and lateral line system) ; 6, lateral line (?) dorsal root of same 

 (external mandibular'?); H., hyomandibular trunk; 9, ganglion of same; Pl., palatine; C.T., 

 chorda tympani; 10, ganglion cells at root of palatine; V., roots (secondary and tertiary) of 

 trigeminus; ^..trigeminus; 2, ganglion of same (Gasserian) ; S.O. V., superficial ophthalmic of 

 the Vth ; Mx. Mn, maxillary (superior maxillary) and mandibular (inferior maxillary) divisions 

 of same ; P., profundus division of same ; 3, ganglion of latter ; 1, foramen through which Vth 

 and Vllth nerves enter orbit ; VIII, root of auditory nerve. 



Figs. 4 and 5. Otolith from sacculus of C/rimara monstrosa, drawn from both sides, x 15. 



