154 



ANATOMY OF VERTEBRATES. 



131 



at the inner angle of the eye. The naso-palatine received the 

 vidian nerve, and the ( spheno-palatine ' ganglionic enlargement was 

 conspicuous at the junction. 1 The largest portion of the maxillo- 

 dental nerve supplied the great canine tooth. The gustatory nerve 

 gave a branch to the lining membrane of the mouth and passed 

 forward dividing into branches which communicated with the 

 6 ninth ' in their course to the surface of the tonjme. 



Such Quadrumana as have been dissected with this view show 

 all the main characters, connections, and accessory ganglions, of 

 the fifth, which are so fully described in late works on the anatomy 

 of Man. The apparent origin or place of emergence of the fifth 

 nerve is at the middle 'crus' of the cerebellum, fig. 128, e, e'. 

 The smaller, or non-ganglionic root e ', being sometimes divided 

 by a few of the commissural or ( crural ' fibres from the larger 

 portion e. This, fig. 131, 10, contracts as it goes into the sub- 

 stance of the macromyelon, and may be traced to behind the oli- 

 vary body, ib. 3, where it is continu- 

 ous with the teretial and restiform 

 columns, and apparently with the 

 grey matter, fig. 57, g. The motor 

 root, fig. 131, n', passes into the 

 macromyelon anterior to the sensory 

 root, and seems to go, in part at 

 least, to the prepyramidal tract ; but 

 Stilling traces it to grey matter at 

 the floor of the fourth ventricle. 

 The recession of the non-ganglionic 

 from the ganglionic roots as they 

 sink into the macromyelonal sub- 

 stance is more patent in some Fishes 

 (vol. i. p. 302). 



Hunter's dissection of the human 

 trigeminal (xcliv. p. 189, in 1754), 

 in which he discovered, independently 

 of Cotunnius, the nasopalatine branch, 

 led him to enunciate the inrportant 

 principle that nerves from distinct 

 origins, supj)lying a particular organ, 

 give it distinct faculties. The nose 

 receives the endowment of smell from its peculiar nerve — the 



1 liv. pi xxxi. fig. 3, B. Swan also shows it in the calf, pi. xxxvi. fig. 3, n. 

 Alcock found the spheno-palatine ganglion in a rabbit, dog and horse, as well as in 

 the cat and cow. covin, p. 286. 



Macromyelon and origin of the fifth nerve, 

 Man; natural size. cevm. 



