192 



COMPARATIVE ANATOMY 



/ 

 / R 



FIG. 151. NERVE ELEVATION OF A URODELE. (Semidiagrammatic.) 



a, a, cells of the epidermis, through which the neiiro-epithelium, 6, 6, can be 

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

 sented) ; R, hyaline tube, formed as a secretion ; 2v, the nerve-fibres passing 

 to and surrounding the sensory cells. 



FIG. 152. SENSORY CANALS OF Chimcera monstrosa. (After F. J. Cole.) The 

 innervation is indicated by the different kinds of shading. 



(1.) Supra-orbital canal (innervated by superficial ophthalmic of facial cross- 

 hatched the black segment is the portion innervated by the profundus) = 

 cranial (C) + rostral (R) + sub-rostral (SR). 



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

 orbital (SO) + portion of angular (A ) + nasal (N. ) 



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

 black )= remainder of angular (A) + oral (0) + jugular (J.) 



(4.) Lateral canal (lateral line branch of vagus oblique shading) lateral (L) 4- 

 occipital (Oc) + aural (An) + post-aural (PAu.) 



