No. I.] THE CRANIAL NERVES OF AMPHIBIA. 147 



of this ganglion emerges the Rr. branchiales, to whose fine 

 fibres this part of the ganglion belongs. This is apparently to 

 some extent distinct from the proximal part {B^ of the second 

 ganglion, being partially separated from the latter by the lateral 

 nerve issuing here. From this proximal part of the second gan- 

 glion {B^ the R. visceralis emerges. Along the inner side of 

 this ganglion also proceed the non-ganglionated fibres mentioned 

 above, together with additional fibres from the cutaneous and 

 motor branches which have in the interval been given off. 

 The fine-fibred R. visceralis must be in part, and perhaps is 

 mostly motor, yet it seems to be ganglionated. Whether it is 

 entirely ganglionated, however, could not be determined. 



The innermost or proximal ganglion {A) belongs chiefly to 

 the cutaneous branches whose fibres, we have seen, pass by 

 mesad of the two distal ganglia, and also to the N. lateralis. The 

 former are in all probability derived from the ascending Trige- 

 minus. It is very probable, however, that some of the fine fibres, 

 especially, perhaps, those of the R. visceralis, are also gan- 

 glionated here. 



These ganglia may be designated A, B, and C, as already 

 indicated, A being the most proximal one. B may be sub- 

 divided into Bi and B2. 



In the older tadpole above referred to (p. 142), the trunk of 

 the IX + X, after giving off / and just as it gives off 2, divides. 

 From the upper and outer division are given off J, ^, 5, 6, and 

 y, from the lower and inner division are given off p and 10. As 

 in the other tadpoles, this latter division is ganglionated further 

 distally (ganglion C). The Rr. branchiales are reduced and the 

 R. visceralis has apparently increased. 



It will be necessary now to describe some points in the finer 

 terminations of certain of these branches. The velar folds 

 mentioned above, a small portion of the filter apparatus, indif- 

 ferent epithelium, and also some taste bulbs, both on the roof 

 of the pharynx and on its floor in the region of the gill open- 

 ings, are innervated by the pharyngeal branches described 

 above. The innervation of the taste bulbs is as described 

 above under the R. palatinus VII. That of the glands, which 

 are so plentiful here, requires further notice on account of its 



