44 



THE OSTEOLOGY AND MYOLOGY 



prominent callous pads, arranged and shaped as in the accompanying figures. The fin- 

 gers and toes have on their under suri\ices similar but better developed tubercles, to the 

 tips, which are enlarged and rounded, and, like the pads, are not tuberculate, but present 

 fine, curved ridges and depressions of cuticle, like the tips of the human fingers. These 

 roughened and scabrous surfaces have evidently direct relation to the scansorial nature 



Fig. 1, a. 



Fig. 1, /;. 



Fig. 2, a. 



Fitr. 2, 6. 



Tier. 3. 



of the animal ; and corresponding modifications occur in the integument of the tail, 

 wliich assumes an almost corneous condition by thickening and hardening of the epi- 

 derm. As far as the hair extends, the skin of the tail is simply tough and dense ; beyond 

 this, the outer covering becomes harder and divided into small plates. These are oval 

 or subcircular, or somewhat polygonal, from mutual apposition. Pigment granules ap- 

 pear in irregular blotches near the base ; the tail is otherwise colorless. A few short, 

 bristly, colorless hairs, like those upon the digits, lying closely appressed, 

 are sparsely scattered over the whole tail. At any given point the scales 

 are largest and flattest above, smallest and most tuberculate underneath ; 

 their average size diminishes regularly, with the tapering of the tail ; 

 they are regularly disposed in oblique rows, like the dorsal scales of ser- 

 pents ; there are about thirty in a circumference ; the obliquity is slight, a 



row making an advance of about four scales' length in each 

 half turn. The reticulation is somewhat imperfectly re])re- 

 sented in fig. 3, which shows the side of the tail, of natural 

 size, at junction of first and second thirds. 



Short fur ascends a little way on the back of the ear, but 

 disappears below the meatus in front. Most of the ear is fiat 

 and "foliaceous"; but toward the base it is much vaulted. 

 The very thin lobule is of moderate size, full and rounded. 

 The posterior margin of the pinna nearly reaches the root of 

 the lobule, and fomis a flap on the inner aspect of the latter. 

 A crescent-formed protuberance lies just outside the termina- 

 tion of the anterior margin of the conch, which latter is lost in 



Fig. 4. 



a transverse fold of integument that forms the anterior or ex- 



