A NEW MYLODON 



While collecting fossils in Nebraska, in 1880, for the Museum of Compara- 

 tive Zoology, Mr. Samuel Garman obtained a nearly perfect skull, together 

 with a large part of the skeleton of a Ground-sloth, Mylodon. Since the re- 

 mains of this genus hitherto discovered in North America have been extremely 

 fragmentary, it seems desirable to publish a brief description of the specimen 

 and to make such comparisons as possible between this and other described 

 species. It proves to be a true Mylodon, approaching in certain respects the 

 genus Paramylodon, and like the latter seems to have been a browsing rather 

 than a grazing type such as M. robustus and M. harlani must have been. Since 

 it appears to represent an undescribed species, I have named it in honor of its 

 discoverer. 



Mylodon garmani, sp. nov. 



Type. — Well preserved skull and parts of the skeleton, No. 8429 M. C. Z., 

 from the Pleistocene of the Niobrara River, Nebraska. Samuel Garman, 1880. 



Horizon. — The locality is practically the same as that of the Hay Springs 

 fauna, probably Mid Pleistocene, though precise details of the situation are 

 lacking. 



General Characters. — A large species of about the size of M. harlani, 

 from which it differs conspicuously in the conformation of the last molars, the 

 fifth upper molar being in outline like a figure 8 with a constriction in the middle 

 on either side; the fourth lower molar much elongated and laterally compressed, 

 with the greater axes of the internal lobes nearly longitudinal instead of trans- 

 verse. Skull high and much narrowed from side to side, with high sagittal crest; 

 pterygoids deep and rounded in side view, palate long and narrow with a very 

 deep and narrow interpterygoid fossa. Edentulous portion of the tip of the rami 

 much contracted. 



Description of Skeleton. 



In the following description of the type specimen, I have as far as pos- 

 sible made comparison with Mylodon robustus, M. harlani, and Paramylodon 



