DESCRIPTIONS OF THE PAPILLARY RIDGES 25 



P.R. middle and proximal phalanges occupied by this tesselated 

 grouping of epidermic scales. 

 (6) Palmar surface. 



Three interdigital eminences. 

 Thenar divided into two portions. 

 One hypothenar. 



Fig. 8.— Common Squirrel. Sciurus 

 wlgaris. Pes, left. Drawing 

 from dead specimen. 



Fig. 10. — KiNKAJOU. Ccrcoleptcs cau- 

 divohndus. Pes, left. Drawing 

 from dead specimen. 



All these eminences show a few rather widely separated ridges. 



ulnar eminence ; wide loops open to ulnar side. 



central eminence ; P.R. longitudinal. 



radial eminence ; wide loops open to radial side. 



thenar eminence ; arches open to radial side in distal portion. 



„ transverse in proximal portion. 



Hypothenar eminence ; slightly curved concavity' in proximal 

 or transverse direction. 



