an outgrowth of related work
done as a Research Assistant under Grant No. 56 G 103 from the National
Science Foundation.

LITERATURE CITED

DALQUEST, W. W.

1953. Mammals of the Mexican state of San Luis Potosi. Louisiana
State Univ. Biol. Sci. Ser., 1:1-233, December 28.

HALL, E. R., and KELSON, K. R.

1959. The mammals of North America. The Ronald Press, New York,
vol. 2:ix + 547-1083 + 79, illustrated, March 31.

OSGOOD, W. H.

1909. Revision of the mice of the American genus Peromyscus. N.
Amer. Fauna, 28:1-285, 8 pls., April 17.

RIDGWAY, R.

1912. Color standards and color nomenclature. Washington, D. C.,
iv + 43 pp., 53 pls.

SAUSSURE, M. H. de

1860. Note sur quelques mammiferes du Mexique. Revue et Mag.
Zool., Paris, ser. 2, 12:97-110, March.

THOMAS, O.

1903. _On three new forms of _Peromyscus_ obtained by Dr. Hans
Gadow, F. R. S., and Mrs. Gadow in Mexico._ Ann. Mag. Nat.
Hist., ser. 7, 11:484-487, May.

_Transmitted June 30, 1961._

29-393

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