1917] 



Stock: Structure of the Pes in Mylodon harlani 



273 



Fusion of the first and second phalanges has given rise to a single 

 element, which is similar in shape to its homologue in the first digit 

 of the manus, but is somewhat heavier and larger. Similarly the 

 ungual is larger and heavier than the corresponding phalanx in digit 

 1 of the manus. The claw process of the ungual points inward. 



Pleistocene beds at Carson City, Nevada. 



The height of the first phalanx of digit 3 is slightly greater than 

 the basal width. The phalanx narrows but little dorsally from the 

 base, agreeing in this character with the same phalanx in M. robustus 

 and differing from the corresponding phalanx in digit 2 of the manus 

 in the latter species and in M. harlani. It differs further from the 



