308 THE MANUS. [CHAP. 



number of phalanges ; but in the other three the metacarpal 

 is short and brood, the proximal phalanx is either sup- 

 pressed or incorporated with the metacarpal, as in some of 

 the Sloths, the middle phalanx is very short, but the ungual 

 phalanx is enormously developed, larger in the third than in 

 the fourth and fifth digits. 



A still further modification of the same type is seen in 

 the extraordinary manus of the great Armadillo (Priodon 

 giganteus\ the largest existing member of the group (Fig. 

 no). The metacarpals of the three outer toes are still 

 further reduced in length, the ungual phalanx of the third 

 is increased in size, while that of the fourth, and especially 

 the fifth, are greatly diminished. 



In the genus Tolypetites the manus is formed on a some- 

 what similar type, except that the first digit is suppressed ; 

 but in the Nine banded Armadillos (genus Tatusia} it is 

 altogether different, the second and third toes being subequal 

 (the third the longest), with moderate, conical, and slightly 

 compressed ungual phalanges : and the first and fourth 

 also nearly equal and smaller, all with the normal 

 number of phalanges. The fifth is absent, or (as in 

 T. hybridd) represented by three very rudimentary nodular 

 bones. 



In the Pangolins (Manis) the scaphoid and lunar are 

 united but all the other carpal bones are distinct. There 



are five digits with the complete number of phalanges, which, 

 except in the pollex, are short and broad. The distal ends 

 of the ungual phalanges have deep median clefts. This 

 phalanx in the third digit is immensely developed, and con- 

 siderably so in the fourth. The first, second, and fifth digits 

 are comparatively small. 



In the Cape Anteater (Orycferopus) the pollex is entirely 

 suppressed, but all the other digits are well developed, and 



