. Bulletin - United States National Museum. Science. 400 MULLETIN 56, UNITED STATES NATIONAL MUSEUM. PEROMYSCUS SONORIENSIS CLEMENTIS (Mearns). SAN CLEMENTE MOUSE. Peromyscus texanus dementis Mearns, Proc. U. S. Nat. Mus., XVIII, 1896, pp. 446, 447 (p. 4 of advance sheet issued March 25, 1896; original description).—Miller and Rehn, Proc, Bost. Soc. Nat, Hist., XXX, No. 1, Dec, 27, 1901, p. 84 (Syst. Results Study N. Am. Mam. to close of 1900). [Peromyscus texensis] dementis, Elliot, Field Col. Mus., Zool. Ser., II, 1901, p. 130 (Synop. Mam. N. Am.); IV, 1904, p. 187 (Mam. Mid. Am.). Type-loca
. Bulletin - United States National Museum. Science. 400 MULLETIN 56, UNITED STATES NATIONAL MUSEUM. PEROMYSCUS SONORIENSIS CLEMENTIS (Mearns). SAN CLEMENTE MOUSE. Peromyscus texanus dementis Mearns, Proc. U. S. Nat. Mus., XVIII, 1896, pp. 446, 447 (p. 4 of advance sheet issued March 25, 1896; original description).—Miller and Rehn, Proc, Bost. Soc. Nat, Hist., XXX, No. 1, Dec, 27, 1901, p. 84 (Syst. Results Study N. Am. Mam. to close of 1900). [Peromyscus texensis] dementis, Elliot, Field Col. Mus., Zool. Ser., II, 1901, p. 130 (Synop. Mam. N. Am.); IV, 1904, p. 187 (Mam. Mid. Am.). Type-locality.—San Clemente Island, off southern California. (Type, skin and skull, Cat. No. 61117, U. S. National Museum.) Geographical range.—Islands of the Santa Barbara group, southern California, and the Coronados Islands, off Lower California. This insular mouse was described as a subspecies of the mainland form for the reason that examples from the nearer islands seemed to be somewhat intermediate in character between the typical form on San Clemente Island and that of the coast. The species occurs on each of the Coronados Islands and on several islands of the Santa Barbara group. Description.—This mouse is considerably larger and much blacker than P. s. medius of the neighboring mainland, and has a more pronounced reddish tinge. The upper surface is drab anteriorly, strongly tinged with burnt umber posteriorly; top of head drab-gray; ears black, with faint hoary edging; feet and under surface white; tail sharply bicolored, blackish above. The above description is based on a series of specimens taken by the author in August, 1894. Mr. A. W. Anthony, the well-known naturalist of San Diego, col- lected a series at the same time, which lie kindly placed at my disposal. The skull (fig. 78) of this island race, while almost as large as that of P. s. deserticola from the lower Colorado River, is more slender and fragile. Iris dark hazel. Habits and local distribution.—This ap
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