DESCRIPTIONS OF THE PAPILLARY RIDGES 61 



(a) Digits. 



P.R. terminal phalanges : D. 1, 2, 3, longitudinal, wide ellipses ; 

 D. 4, 5, loops open to ulnar side, 

 middle phalanges : D. 2, low arches open in proxima direc- 

 tion ; D. 3, nearly transverse ; D. 4, 5, rounded arch open 

 in proximal direction. 



Fig. 49.— Chimpanzee. Anthropopithecus troglodytes. Pes, left. Drawing 

 from impressions. 



P.R. proximal phalanges : D. 1, transverse ; D. 2, loops open to 

 radial side ; D. 3, transverse and loops open to radial side, 

 and low arches open in proximal direction ; D. 4 and 5, 

 wide arches open in proximal direction. 

 (b) Palmar surface. 



One interdigital eminence opposite cleft of D. 4 o.nd 5. 

 Thenar eminence moderately developed. 

 Hypothenar eminence slightly developed. 



