TOUCH-CORPUSCLES. 



423 



satisfactorily determined. In some parts, especially those 

 in which the sense of touch is highly developed, as for 

 example, the palm of the hand and the lips, the fibres 



Fig. 112* 



appear to terminate, in many of the papilla?, by one or 

 more free ends in the substance of a dilated oval-shaped 

 Tbody, not unlike a Pacinian corpuscle (figs. 136, 137), 

 occupying the principal part of the interior of the papillae, 

 and termed a touch-corpuscle (fig. 113). The nature of this 

 body is obscure. Kolliker, Huxley, and others, regard it as 



* Fig. 112. Vertical section of the skin and subcutaneous tissue, 

 from end of tlie thumb, across tue ridges and furrows, magnified 20 

 diameters (from Kolliker) : a, horny, and &, mucous layer of the epi- 

 dermis ; c, corium ; d, panniculus adiposus ; c, papillre on the ridges ; 

 /, fat clusters ; g, sweat-glands ; h, sweat-ducts ; i, their openings on 

 the surface. 



