ARRANGEMENTS OF THE PAPILLARY RIDGES 169 



particular case of a woman aged forty -nine, the depth of this area 

 on each foot measured was one and a half inches from the plantar 

 surface. 



The extensor surface, or back, of the little toe shows ridges 

 when it is distorted by ill-fitting boots. 



In man ridges frequently appear on the radial side of the back 

 or extensor surface of the index finger to nearly the middle line 

 of the finger, and this is often more on the right than the left hand. 



