A NEW MYLODON. 
W8ILE collecting fossils in Nebraska, in 1880, for the Museum of Compara- 
tive Zodlogy, 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. noy. 
Typr.— 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 
