Johnston, Nerves of Petromyzonts. 



SIS 



cutaneous. The mesal fibers of fig. 4 now break up in the fining 

 of the buccal cavity. The velar nerve {v.n.) and the pure motor 

 root {man.) are now separate from the maxillo-mandibular gan- 

 glion. The other nerves in this drawing need no further comment. 

 In fig. 6 the maxillo-mandibular complex is in three parts. The 

 large cephalic ramus runs parallel with that mentioned in fig. 5 



Fig. II. Combination. On the face of this figure are indicated the areas from which Figs. 21, 

 23 and 25 are drawn. 



and the two together doubtless innervate the skin of both surfaces 

 of the buccal funnel, ventral to the area supplied by the ophthal- 

 mic nerve, and especially the tentacles around its border. A 

 large lateral ramus starts to go down beneath the orbit, and a 

 smaller ramus goes caudally and ventrally behind the orbit. The 

 pure motor ramus of V {man.) has now given off a mesal branch 

 which in fig. 7 is seen entering the m. velo-hyomandibularis 



