VERTEBRATE FAUNA OF THE BLANCO BEDS. 



49 



Fig. 1. Testudo pertenuis, Cope, one-fourteenth natural size. 



1. Portion of carapace from above. 



2. Posterior lobe of plastron from above. 



EDENTATA. 

 MEGALONYX, JefiF. 



MEGALONYX LEPTOSTOMUS, Cope. 



Sp. nov. Plate III, Figures 1-3. 



This species is represented by a number of fi-agments of the skull and 

 a superior molar tooth, probably the last of the series. The most instruc- 

 tive fragments are the palatal portions of both premaxillaries, with the 

 alveoli of the canine-molars; and portions of the palatal portions of the 

 maxillaries, with parts of alveoli of several molars. The right occipital 

 condyle is also preserved. 



The only species in which the corresponding portions of the cranium 

 are known are the Megalonyx jeffersonii, Harl., and the M. leidyi, Lindahl, 

 but the teeth of the other species may be compared with those of the 



4— Geol 



