ii SENSIBILITY OF THE INTERNAL OEGANS 85 



true touch spots. On exciting with pointed mechanical stimuli 

 an exceptionally high threshold of excitation is found, corre- 



r \ 



I 



I, 







1 1 M 1 ! 



rm 



FIG. 32. Compound genital corpuscle from labia minores. (Sfameni.) b.c., blood capillaries ; 

 a. axonal network ; c.s., connective tissue sheath. 



sponding to that of pain, but not to that of contact, which is 

 normally much lower. 



At the root of the penis the touch spots become less 



ex.fi. 



FIG. 33. Cylindrical Ruffini's corpuscle, from labia minores. (Sfameni.) ./., myelinated nerve- 

 tibre; e.c.s., elastic connective sheath, surrounding granular substance. 



frequent; they are more abundant as the border of the pre- 

 puce is reached ; on the internal surface of the prepuce, which 

 covers the gland, they diminish gradually and disappear. The 



