CUTANEOUS NERVE-TERMINATIONS IN MAMMALS. 593 



Fig. 19. Subepidermic nerve-ganglion cells c iu direct continuation with intra- 

 epidermic nerve-fibrils, from the nose of the Horse. 



Fig. 20. Subepidermic nerve-ganglion from the nose of the Horse, showing the 

 manner in which non-meduUated nerve-fibrils of the subepidermic 

 plexus get dragged into the epidermis, where they become the so- 

 called intraepidermic or free nerve-endings. 



Fig. 21. Last vestiges of a subepidermic nerve-ganglion, as seen in figs. 19 and 

 22, which has become entangled iu the epidermis, and is now about to 

 be thrown off from the surface, dragging a tangled mass of nerve- 

 fibrils of the subepidermic nerve-plexus after it through the epidermis. 



Plate XVI. 



Fig. 22. Subepidermic nerve-ganglion from the snout of the Pig. 



Fig. 23. Subepidermic nerve-ganglion from the nose of the Bullock. T\yo of 

 the cells of Langerhaus, c I, are also seen there, which have evidently 

 broken ofi" fi-om the plexus ; in the one to the right the two processes 

 are seen which previously connected it with a subepidermic non- 

 meduUated nerve-fibril. 



Fig. 24. Intraepidermic nerve-fibril from the nose of the Cat, showing the ten- 

 dency of the free end to put out branches which tend to grow laterally 

 or parallel to the surface of the dermis, instead of perpendicular to it 

 as supposed by Ranvier. X 250. 



Fig. 25. Intraepidermic nerve-fibrils from the snout of the Hedgehog, showing 

 triangular swellings. 



Fig. 26. Intraepidermic nerve-fibrils from the lower lip of the Mole. 



Fig. 27. Intraepithelial nerve-fibril from the moist mucous membrane of the 

 cavity of the mouth of the Mole, showing large bead-like swellings 

 due apparently to the moisture. 



Fig. 28. Silver preparation of subepidermic nerve-plexus of non-medullated 

 fibrils and branched cells, from the surface of the skin of the Hedge- 

 hog : e, outlines of lowest layer of epidermic ceUs ; at m a meduUated 

 nerve is seen joining the plexus. This may be taken as the type of an 

 irregularly placed nerve-plexus in the dermis. X 200. 



Fig. 29. Silver preparation of the subepidermic nei-ve-plexus iu the skin of the 

 Eat, where, owing to the fibres accompanying the large regular plexus 

 of veins, they form regular bundles from which twigs are given off 

 to the hair-follicles. X 200. 



LINN. JOURN. — ZOOLOGY, VOL. XVI. 44 



