56 Bidletin of Laboratories of Denison Uriiversity. [Voi. xii 



in the epidermis and extending only part way through it, with 

 a layer of unmodified epidermal cells between the bud and the 

 dermis. 



All parts of the body of Ameiurus which are supplied with 

 terminal buds are reached by branches of the facial nerve from 



muc 



cl_J 



Fig. 2. Section through the skin of the top of the head of Ameiurus 

 tnelas, showing a terminal bud. X 560- {From the journal of Comparative 

 Neurology, Vol. XI, No. 3, Oct., 1901, Plate XVII, Fig. 11. At ^ is the der- 

 mis, which is raised into a low papilla under the sense organ and whose center 

 is pierced by the nerve for the organ; cl, clavate cells of Leydig; muc, mucous 

 cells of the epidermis. 



the geniculate ganglion. In other words, the rami from the 

 communis root of the facialis are distributed to nearly the whole 

 outer body surface of this fish. On the distal side of the gang- 

 lion these rami usually join themselves to other cutaneous 

 branches which are phylogenetically older, belonging to the 

 general cutaneous and lateral line systems. Even the great re- 



