508 



TITANOTHERES OF ANCIENT WYOMING, DAKOTA, AND NEBRASKA 



Standard measurements in tJie Allops 'phylum,"- in millimeters 



o Allops, like BiploclonuSj is a less clearly consecutive and distinguished phylum than Brontops, Menodus, or Broniothenum. For observations on the measurements 

 see p. 507. ' Estimated. 



The Allops phylum as represented in the Hatcher collection of 26 sTculls and lower jaws from the Chadron formation 



in the United States National Museum 



