PATAGONIAN EXPEDITIONS I PALAEONTOLOGY. 



EXPLANATION OF PLATE XL. 



PAGE 



BORHY^NA TUBERATA: Left side of the skull and mandible, X i (No. 15,701). 

 The lower canine and M T are supplied from the opposite side. The oc- 

 ciput is restored to correspond with that of B. excavata, and the extent 

 of the restoration is indicated by the neutral tint ..... 356 



(voi. iv.) 



