304 



ANATOMY OF VERTEBRATES. 



ib. v, gives off a palatine nerve (r. pterygo-palatinus), and supplies 

 the integuments, mucous tubes, and teeth of the upper jaw. The 

 super-orbital division, ib. e, gives off the two ciliary nerves, one 



203 



Cerebral nerves, Perch, xxin. 



of which joins the ciliary branch of the third ; it supplies the 

 olfactory sacs, and the integuments of the upper and fore part of 

 the head. 



In the Skate the large sensory branches of the fifth, sent to the 

 integuments, and to the singularly developed mucous canals, have 

 ganglionic enlargements near their origins, fig. 202, a, b, where 

 they leave the main trunk. The first electric nerve is given off 

 by the fifth in the Torpedo, fig. 139, 5, and many of the terminal 

 filaments of the tegumentary branches of the fifth are connected 

 with the peculiar muco-ganglionic corpuscles, described at p. 324, 

 fig. 215. 1 In the Sturgeon the snout and its tentacula are sup- 

 plied by branches of the infra-orbital, not from the supra-orbital, 

 division of the fifth ; the opercular or facial branch supplies, in 

 addition to the gill-cover, the integuments and lips of the pro- 

 tractile mouth, and the pseudobranchia : it communicates with 

 the glosso-pharyngeal. 



In the Lancelet the fifth nerve, fig. 169, ob, distributes many 

 filaments to the expanded sensitive integument which represents 



1 I.XXYII. 



