1292 



CLASS MAMMALIA. 



species of the genera Dasy_pus, Tatusia, Tolypeutes (fig. 1161), and 

 Xenurus. In the Pleistocene of Argentina we meet with a large 

 extinct type known as Eutatus, which is characterised by the whole 

 of the carapace consisting of movable bands, which are thirty-three 

 in number. The Tertiaries of the same region have also yielded a 

 much larger form known as Dasyflotherium, which appears to con- 

 nect the living forms with the next genus. There were eight lower 

 teeth, of which the second appears to have been enlarged, as in 

 some species of Mylodon. The most remarkable genus is, however, 



Fig. 1161. — The three-banded Armadillo {Tolypeutes conurus). 

 One-third natural size. (After Murie.) 



South America. 



Chlamydotherium, of the South American Pleistocene, in which the 

 teeth approximate in structure to those of the next family. The 

 carapace has several movable bands ; and the largest species is con- 

 sidered to have equalled the bulk of a Rhinoceros. The existing 

 Armadillos are therefore dwarfs by the side of these huge allies of 

 an earlier epoch. 



Family GLYPTODONTiDyE. — In this extinct American family the 

 body was covered by a carapace as in the Armadillos ; but this 

 carapace (fig. 1162) has no movable bands, so that the animal 

 could not roll itself up ; and since the fore-feet have short thick 

 toes, it is evident that the habits of this group were not fossorial. 

 The carapace usually has its component scutes united by suture, 

 but in one genus they were separate ; the scutes are, moreover, 

 usually ornamented with a sculpture, which varies in the different 



