b " ^^ T>^ \ Vol. 60; pp. 131-132 October 9, 1947 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON A NEW SHEEW (GENUS SOREX) FROM COAHUILA By Hartley H. T. Jackson '■■1 In the winter of 1941-1942, F. W. Miller, of the Dallas Mu-seum of Natural History, Dallas, Texas, sent to the U. S. Fish and Wildlife Service for identification and study a collection of mammals that he had made in Sierra del Carmen, Coahuila, Mexico, during the two preceding autumns. Many of the specimens have been kindly donated to the Biological Surveys collection b.y Mr. Miller, who will publish the results of both his field and the laboratory studies. Among the material are specimens of a heretofore unknown shrew, which is herewith named for the collector in recognition of his mammalogical work, and which may be recognized by the following descrip-tion: Sorex milleri, sp. nov. Carmen Mountains Shrew Type-specimen. — No. 274,950, U. S. National Museum, Biological Surveys collection; 2 (?) adult, skin and skull; collected November 1, 1940, by F. W. Miller. Original number 19 ; Biological Surveys mis-cellaneous 32,327X. Type-locality. — Madera Camp, altitude 8,000 feet, Carmen Mountains, Coaliuila, Mexico. Diagnostic characters. — Smallest of the vagrans-ohscurus group, to vi'hich it apparently belongs. Color slightly more grayish than in Sorex vagrans monticola; distinctly paler and more grayish than in S. v. orisabae. Skull small (smallest of the vagrans-ohscurus group), flattened, relatively broad interorbital constriction; dentition weak, the third upper unicuspid scarcely if any smaller than the fourth, almost equal to it in size. Color. — Type specimen and topotype apparently in fresh winter pelage: upper parts between hair brown (colors of Ridgway, Color standards and color nomenclature, 1912) and drab, a little nearer drab; sides and flanks a trifle paler, drabbish; under parts pale smoke gray tinged with vinaceous buff; tail bicolor, light drab above, pinkish buff below. Measurements. — Type-specimen: Total length, 95; tail vertebrae, 44; hind foot, 11.. Skull of type-specimen: Condylobasal length, 15.5; palatal Hength, G.2 ; breadth of cranium, 7.4; interorbital constriction, 3.7; maxillary breaijth^,^^; maxillary tooth row, 5.5. '^C'Tl <^^ — Peoc.^qj.. Soc. Wash. Vol. 60, 1947 (131)
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