PALAEOPELTIS 205 



anterior part of the exposed surface and none on the margin. 

 A movable plate measures 41 mm. long by 22 mm. wide. 

 One of the horn-like plates from the cephalic shield is 

 35 mm. long, by 30 mm. wide, and has a height of 44 mm. 



GLYPTODONTIA 



This suborder is most sparingly represented, apparently 

 on account of unfavorable habitat. Ameghino has de- 

 scribed a few fragments of the carapaces of these forms, 

 making the genera, Palaeopeltis, and Glyptatelus, both 

 pre-Santa Cruz genera. 



Palaeopeltis Ameghino 



Palaeopeltis Amegh., 1895, Bol. Inst. Gcog. Argen., t. 15, p. 659. 



The basis of this genus is a few plates of a glyptodon- 

 like animal of considerable size, but the plates are without 

 ornamentation. This form Ameghino considers inter- 

 mediate between glyptodonts and armadilloes. I feel 

 that there is too little of the skeleton known to justify this 

 conclusion, especially as glyptodonts of a considerably 

 higher grade of specialization are contemporaries of this 

 form. 



Fig. 134. P. iuornatus: a single plate — natural size. 



