0. C. Marsh—Mammals of the order Dinocerata. 117 
sion. Mechanical loss is thus completely prevented, as the 
soft capsule may readily be filed so as to fit the crucible ac- 
curately.* 
acknowledgments are due to Mr. W. E. Cutter for his 
most efficient aid in the prosecution of my work. 
December 16th, 1872. 
Art. XV.—On the gigantic fossil Mammals of the Order 
Dinocerata ; by O. C. MarsH. With plates L and IL 
AMONG the many extinct animals of interest hitherto dis- 
covered in the Tertiary of the Rocky Mountain region, none, 
perhaps, are more remarkable than the huge mammals which 
have recently been described from the Eocene beds of Wyom- 
ig. It is important, therefore, that accurate information in 
regard to them should be promptly made public, especially as 
Serious errors on this subject have already appeared in various 
Scientific publications, and are being widely disseminated. 
_ These animals nearly equalled the elephant in size, and had 
original description of the type species, Zinoceras anceps Marsh 
he skull however, presents a most remarkable combination 
of characters, It is long and narrow, and supported three 
phia Academy, Dr. Leidy described a characteristic specimen as 
Uintatherium robustum, and likewise gave the name Uintamashax 
* As an example of the utility of this little apparatus, I may refer to Mr. R. H. 
rae 1 = Q tomic ie ts of cobalt pa nickel. See this Journal, vol. 
y, 1871, ; 
t This Journal, Vol. ii, p. 35. ¢ American Philosophical Soc., vol. xii, p. 420 
