DESCRIPTION OF SPECIES EXAMINED 89 



hind foot and exhibits a striking grouping of the skin-structures. 

 The scales, or nodules, are situated in rough transverse rows and 

 are separated from one another by marked broad depression! or 

 furrows. Each scale has its own group of small papillae of the 

 corium, and a varying number of dark pigmented bands the 

 deeper terminations of which end in openings of ducts of sweat- 

 glands. 



Fig. 67, from the plantar surface and Fig. 68, from the same 

 surface in front of the heel, show a similar but less-marked 



Fio. 66. — Brush-tailed Wallaby. Pttwgnle penicillata. x 20. Pes, D. 4, 

 terminal phalanx, longitudinal section through tesselated scales. 



arrangement of these dark bands and Drlisenleisten. Fig. 69, 

 in front of the heel, shows still less differentiation of the struc- 

 tures and Fig. 70, a smooth thickened epidermis and level corium 

 without any papillae of the corium, no tesselated scales being 

 present in this region, which is one subject to great pressure and 

 not needing much, if any, assistance from the sense of touch. 



Figs. 71, 72 are from the small forefoot and in keeping with 

 its subordinate use in the life of the Kangaroo, the scales of the 

 epidermis and Drlisenleisten and papillae of the corium, are 

 ill-developed. 



Fig. 73, a section from the hind foot of (Epypryfnnus rufescens, 

 epidermis httle modified, but papillae of the corium very large 

 and projecting far up into the epidermis. 



Macropus antilopinus (Fig. 74). — The hind foot has large 

 and projecting nodules into wliich the papillary layer of 



