\ 



CUTAJSTEOUS NEETE-TEEMINATIONS IN MAMMALS. 561 



might, by any illusion in focal depth, have given incorrectly to 

 the cell c the appearance of being contiauous with the forked 

 fibre /"peripherally. Both centrally and peripherally the same 

 cell appears to be connected with very fine non-medullated fibrils 

 having fine varicosities in their course. Whether the forked fibre 

 / really terminated as shown in the drawing, is open to question ; 

 for the absence of staining beyond these free ends might make it 

 appear that they ended there when possibly they were continued 

 further on. On more than one occasion also we have observed 

 that one of the very fine non-medullated nerve-fibrils connected 

 with such cells passed into the circular coil of nerve-fibres ?, fig. 7, 

 and became incorporated with it. At other times, we have ob- 

 served, in a longitudinal section parallel to and through the axis 

 of the hair, that long intraepithelial non-medullated fibrils con- 

 tinuous with such cells were to be traced (as in fig. 17, i f) ramifying 

 between the cells forming the epidermic lining of the follicle. 

 The important bearing that their position there has upon the 

 whole question of intraepithelial or intraepidermic nerves wiU be 

 considered (p. 586) when we specially consider that system of fibres. 



Moreover, in innumerable cases, as in fig. 7, nerve-fibrils could 

 be seen passing out peripherally from these cells, parallel to the 

 forked terminations on the meduUated nerves, and generally with 

 their own terminations concealed by the forks amongst which 

 they lay. 



Finally, in transverse sections of either feelers or ordinary 

 hairs, as in fig. 13, PI. XIV., nerve-fibrils, continuous with the 

 ganglionic nerve-cells, could be seen passing from these cells 

 towards the free surface of the follicle. The importance of this 

 arrangement wiU appear ^hereafter when we come to consider 

 the intraepidermic nerves in general. We may also note the 

 fact that, in transverse sections of hair -follicles, Eberth ob- 

 served many years ago the presence of the branched cells of 

 Langerhaus among the cells forming the epidermic lining of the 

 follicle. These are, no doubt, originally the ganglionic nerve- 

 cells whicli have become entangled in the epidermis and broken 

 ofi" from the plexus, as will found further explained in the chapter 

 on the cells of Langerhaus. 



Forhed Nerve-terminations on Satrs. 



WhUe the swollen or cellular terminations just considered have 

 for at least ten years been known to science under some descrip- 



LINN. JOUEN. — ZOOLOGY, VOL. XYI. 42 



