40 THE SENSE OF TOUCH IN ANIMALS 



looped P.R. opening to fibular side ; and on heel loops 

 open in distal direction. Rest of sole longitudinal and 

 oblique. 



Arabian Baboon (Papio hamadryas). 

 Hand. (Fig. 26.) Digits short, straight, with short nails ; palmar portion 

 thick and fleshy, 

 (a) Digits. 



P.R. terminal phalanges, longitudinal wide eUipses. 

 „ middle phalanges, transverse. 



„ proximal phalanges : D. 1 and 3 transverse ; D. 2, 4, 5 oblique, 

 converging to centre of the five digits, i.e., to the median 

 line of D. 3. 

 (/>) Palmar surface. 



Three interdigital eminences. 

 P.R. ovate wide whorls, on ulnar emmence inclining to radial 

 side. 

 „ thenar eminence longitudinal on distal portion ; wide loops 



open to ulnar side on proximal portion of eminence. 

 „ hypothenar eminence wide transverse, and grouped into two 

 areas of loops open to ulnar side. 

 Rest of palm longitudinal and oblique. 

 Foot. (Fig. 27.) Plantar portion large digits, especially D. 1 ; small nails, 

 short, 

 (a) Digits. 



P.R. terminal phalanges, wide eUipses longitudinal. 

 „ middle phalanges, transverse and oblique. 

 „ proximal phalanges, D. 1, 2, 3 oblique ; D. 4, 5 loops open to 

 ulnar side. 

 (6) Plantar surface surrounded by border of fleshy eminences, except 

 at cleft of D. 1 heel, and two gaps at clefts of D. 2 and 3 and D. 4 

 and 5 ; large rounded eminence at base of D. 1 ; interdigital 

 eminences well marked. 

 P.R. interdigital eminences, tibial, ovate whorl sloping to fibular 

 border ; central, ovate whorl longitudinal ; fibular, ovate 

 whorl sloping to tibial border. 

 „ eminence at base of D. 1, ovate whorl ; proximal portion low 



arches open in proximal direction. 

 „ eminence on fibular border, two groups of wide loops open 

 to fibular side ; the rest of eminence low arches open in 

 proximal direction. 



Chacma Baboon {Papio porcarius). 

 Hart 'I. (Fig. 28.) Digits all short, and relatively thin nails, long and 

 blunt. Palmar portion very fleshy and surrounded with border 



