THE EDENTATES 



167 



dible the two halves of which were fused together at the 

 symphysis while the condyle was placed at the level of the 

 teeth thus resembling in these respects the Two-toed Sloth. 



Comparing the skull of the Armadillo with that of the Sloth 

 or better with that of the Anteater Ave are impressed by its 

 angularity, by the prominent muscular ridges especially those 

 of the neck muscles hafting the head on to the trunk, by the 



Fig. 57-C and D. — Lateral aspects of skulls of: 



C. Aard-vark (Orycteropus capensis, Oberlin College Collection). 



D. Anteater (Tamandua tetradactyla, 9.311-1). 



Note the slenderness of the mandible in D, and of the edentulous portion in C, 

 the reduction in ruggedness of the skull and the small size of the temporal attach- 

 ments in the Anteater compared with the skulls of other Edentates. 



tapering of the anterior part of the mandibular body and by 

 the slender cylindrical muzzle in front of the first upper teeth. 

 The stout zygoma of the Armadillo attracts attention since the 

 two component parts of this arch do not meet in the Sloth and 

 are even less developed in the Anteater. Variation in form of 



