EDENTATA OF THE SANTA CRUZ BEDS. 



109 



punctate. Eucimpeltus has quite a different type of head-shield ; the 

 plates, eleven or fifteen in number, are all coossified into a single massive 

 bone and the sutural lines between more or fewer of them are elevated 

 into very prominent, sharp and jagged ridges ; no sculptural pattern is ap- 

 parent, but in a greater or less number of the plates, varying in the 

 different species, is a deep central pit, and the whole surface of the shield 

 is coarsely punctate. In Metopotoxus the pattern appears to be nearly 

 obliterated, the grooves being very obscure or entirely absent. 







o 

 



o 







w 







FIG. 8. 



Upper teeth of glyptodonts, x . a, Glyp- 

 todon asper, left side (after Burmeister) ; b, 

 Propalaohoplophorus australis, right side ; c, 

 Eucinepeltus petestatus, right side. 



<2 6 



FIG. 9. 



Lower teeth of glyptodonts, left side, x . 

 a, Glyptodon asper (Burmeister) ; b, Propalceo- 

 hoplophorus australis; c, Eucinepeltus petes- 

 tatus. 



5. The hair must have been scantily developed, as is indicated by the 

 number and size of the piliferous pits. In the carapace these pits are 

 small and are placed at the intersection of the radiating grooves of the 



