22 THE SENSE OF TOUCH IN ANIMALS 



Azaea's Oposstjm {Didelphys azarce). 

 Hand. (Fig. 3.) All five digits well developed with strong curved nails, 

 (a) Digits ; palmar surface, broad. 

 P.R. ellipses on terminal phalanges. 

 „ middle and proximal phalanges covered with transverse rows 

 of nodules, which arc themselves marked with obUque fine 

 papillary ridges. 



W, yy//^ 



Fia.[5. — Squikrel-like Phalanger. 

 Pttanrus sciureus. Manus, 

 right. Drawing from dead 

 specimen. 



Fig. 6. — Squirrel-like Phalanger. 

 Petaurus sciureus. Pes, right. 

 Drawing from dead speci- 



(b) Palmar surface. 



Three mterdigital eminences, oval and fleshy. 

 One large eminence at base of D. 1 and small thenar eminence. 

 One small hypothenar eminence. 

 P.R. wide ellipses on all eminences except the ulnar interdigital, 

 where they are oblique. 

 „ all the rest of the surface covered with nodules irregularly 



Foot 



. (Fig. 4.) More slender than hand. 



D. 1 well developed with broad, fleshy pulp and no nail. 



D. 2, 3, 4, 5 long and furnished with long sharp, curved nails. 

 (a) Digits. 

 P.R. ellipses on all terminal phalanges. 



