1855. _Characteristics of some new species of Mammalia,
collected by the U. S. and Mexican Boundary Survey, Major W.
H. Emory, U. S. A. Commissioner._ Proc. Acad. Nat. Sci.
Philadelphia, 7:331-333, April.
1858. Mammals. _In_ General report upon the Zoology of the
Several Pacific railroad routes. U. S. P. R. R. Exp. and
Surveys, pp. xlviii + 757, 60 pls., July 14.