192 



COMPARATIVE ANATOMY 



B 



Fig. 151. — Nekvb Elevation of a Urodelb. (Semidiagrammatic.) 



I, cells of the epidermis, througli which the neuro-epithelium, b, h, can be 

 seen ; c, the terminal hairs of the latter (the peripheral cells are not repre- 

 sented) ; if, hj'aline tube, formed as a secretion ; If, the nerve-fibres passing 

 to and surrounding the sensory cells. 



Fig. 152. 



(1- 



-Sexsoby Canals of Chimaira monstrosa. (After F. J. Cole.; 

 innervation is indicated by the different kinds of shading. 



The 



Supra-orbital canal (innervated by superficial ophthalmic of facial — cross- 

 hatched — the black segment is the portion innervated bj- the, pi-ofundus) = 

 cranial (C) + rostral {S) + sub-rostral {SR). 



(2.) Infra-orbital canal (buccal -I- otic of facial — dotted) = orbital (Or) -I- sub- 

 orbital {SO) + portion of angular {A ) + nasal {X. ) 



(3.) Hyomandibulai' or operculo-mandibular canal (external mandibular of facial 

 — black) = remainder of angular (A) + oral (0) -I- jugular (■/.) 



(4. ) Lateral canal (lateral line branch of vagus — oblique shading) = lateral [L) + 

 occipital (Or) -I- aural (An) + post-aural {PAu.) 



