| | | 4.1 | 3.5 | |
RAM no. 1674 | | | | | 3.4 | 4.2
KU no. 11210 | 2.4 | 1.6 | 3.9 | 3.5 | 3.8 | 4.1+
UCM no. 21073 | | | | | 3.6 | 4.1
-----------------------+------+-----+---------+--------+---------+--------
| m1 | m2
+---------+--------+---------+--------
| length | width | length | width
+---------+--------+---------+--------
Princeton no. 13585[3] | 3.5 | 2.4 | 3.7 | 2.8
RAM no. 1000 | 3.5 | 2.2 | |
RAM no. 598 | | | 3.8 | 2.6
RAM no. 1001 | | | 3.6+ | 2.6
RAM no. 1079 | | | 4.0 | 2.8
RAM no. 3013 | | | 3.6 | 2.8
------------------------------------+---------+--------+---------+--------

[Footnote 1: Length defined as maximum dimension of the labial half of
the crown measured parallel to a line drawn through the apices of
paracone and metacone. Width defined as maximum coronal dimension
measured along line perpendicular to line defined by apices of paracone
and metacone.]

[Footnote 2: Dimensions provided by Dr. Glenn L. Jepsen.]

[Footnote 3: Dimensions taken from Jepsen (1934:300).]

Literature Cited

ALF, R.
1962. A new species of the rodent _Pipestoneomys_ from the
Oligocene of Nebraska. Breviora, Mus. Comp. Zool., no. 172,
pp. 1-7, 3 figs.

GALBREATH, E. C.
1953. A contribution to the Tertiary geology and paleontology
of northeastern Colorado. Univ. Kansas Paleont. Cont.,
Vertebrata, art. 4, pp. 1-120, 2 pls., 26 figs.

HOUGH, J., and ALF, R.
1958. A Chadron mammalian fauna from Nebraska. Journ. Paleon.
30:132-140, 4 figs.

JEPSEN, G. L.
1934. A revision of the American Apatemyidae and the description
of a new genus, _Sinclairella_, from the White River
Oligocene of South Dakota. Proc. Amer. Philos. Soc.,
74:287-305, 3 pls., 4 figs.

MCKENNA, M. C.
1960. Fossil Mammalia from the early Wasatchian Four Mile fauna,
Eocene of northwest Colorado. Univ. Califor