PATAGONIAN EXPEDITIONS! ZOOLOGY. 



EXPLANATION OF PLATE IV. 



PAGE 



HippocAMELUS BisuLcus : Skull. J* ad., X i^. Upper Rio Chico, eastern 



base of Cordilleras, Patagonia. U. S. Nat. Mus. No. 93,399 . . 11 



(vol. Ill) 



