ERRATA. 



P. 155. For " Both these characteristics coexisted in the Megatherium, the size of the 

 proboscis being diminished," read " Both a prehensile tongue and proboscis, but of mode- 

 rate size, coexisted in the Megatherium." 



In note to Description of PI. XXII. for " caolcis " read " os calcis." 



