592 DBS. GEOKGE AND EBANCBS E. HOGGAN ON 



Fig, 7. Nerve-terminal apparatus on an ordinary hair-follicle from the nose of 

 the Horse. Compare with figs. 4 and 6 under the same magnifying- 

 power, (See p. 556.) 



Fig. 8. Transverse section through the epidermic downgrowth of the organ of 



Eimer in the Mole, at the general level of the lower surface of the 



epidermis. 



Plate XIV. 



Fig. 9. Nerve-terminal apparatus of an aborted or only partially developed 

 feeler hair from the lower lip of the Water-Shrew. It stands mid- 

 way as to nerve-apparatus between feelers and ordinary hair-follicles. 

 (See p. 564.) 



Fig. 10. Yiew, under a comparatively low magnifying-power of 150 diameters, 

 of a portion of the ganglionic nerve-cells connected with a meduUated 

 nerve on the follicle of a feeler hair from the nose of a Horse. This 

 figure contains about the twentieth part of the whole. 



Fig. 11 represents a small portion of the cells seen in fig, 10 under a doubly 

 magnifying power. (See p. 558.) 



Fig. 12. View, in profile, of the course followed by a medullated nerve which, 

 upon losing its myeline at n, passes through the basement-membrane b 

 of the feeler hair-follicle, and curves downwards and inwards to become 

 attached to the ganglion-cells. (See p. 559.) 



Fig. 13 shows portion of a transverse section across feeler hair and folHcle from 

 the nose of the Horse, h, body of hair ; c h, cuticle of hair ; cf, cuticle 

 of hair-follicle ; e, epithelial lining of foUicle, amongst the cells of 

 which intraepidermic nerve- fibrils if are seen ramifying and in con- 

 nexion with the ganglion-cells c on the hair-follicle ; a, cavities in the 

 cavernous portion of hair-follicle ; b, basement-membrane of follicle, 

 in which the extremities of two nerves are seen to be bifurcating ; d, 

 bundles of nerve-fibres passing to terminate on hair-follicle, and seen 

 in transverse section ; gr, peripheral portion of gelatinous layer of 

 hair-follicle. (See pp. 553, 561.) 



Fig. 14. Nerve-terminal apparatus on large and small hair-follicles from tail of 

 Water-Shrew. (See also fig. 6, PI. XIII.) 



Fig. 15. Isolated nerve-ganglion cell c ending in forked terminations, from, the 

 follicle of an ordinary hair. These cells on ordinary hairs are seldom 

 seen in connexion with medullated nerves as in feeler hairs. (See 

 p. 560.) 



Fig. 16. Subepidermic ganglionic nerve-cells c in connexion with intraepidermic 

 nerve-fibrils, the homologues of the cell seen in fig. 15, showing that 

 cell and fibrils cannot have separate nerve-functions as imagined by 

 Merkel and others. 



Fig. 17. Intraepidermic nerve-fibrils, if, ramifying amid cells of epithelial lining 

 of ordinary hair-follicle lying between mouth of sebaceous gland and 

 the free surface of the epidermis. (See p. 566.) 



Plate XV. 

 Fig. 18. Subepidermic nerve-ganglion cells, c, and intraepidermic nerve-fibrils 

 on the nose of a newly-born kitten. In many cases the fibrils are seen 

 to be continuous with the gangUon-cells. 



