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Show 424 MR. R. LYDEKKER ON THE [Apr. 6, Kadiak Bear, the British Museum specimen appears larger, with less expansion of the zygomata, and the arching not so high or so sudden, but more regular. This Bear is doubtless the Ursus ferox of Temminck's ' Fauna Japonica,' which was from the north island of Japan. Ursus japonlcus, on the other hand, probably comes from the southern island, of which the fauna, M r . Thomas tells me, is of an Oriental type, whereas that of Tezo is strictly Holarctic. 8. URSUS ARCTUS DALLI.-Alaskan Brown Bear. Ursus clalll, Merriam, Proc Biol. Soc. Washington, vol. x. p. 71 (1896). Ursus sltkensls, Merriam, op. cit. p. 73. This Bear, although very large, is slightly inferior in size to the one inhabiting Kadiak Island, and has the frontal region of the skull but slightly elevated and nearly flat. In the typical form, from Yakutat Bay, the upper carnassial is unusually large, with an additional internal tubercle, the lower carnassial has accessory tubercles on the inner side of the talon, and the fourth lower premolar has a well-developed postero-internal cusp. On the other hand, in the rather smaller form from Sitka the upper carnassial is normal (tricuspid), the lower carnassial bas no accessory tubercles on the inner side of the talon, and the fourth premolar (if I understand the description rightly) has only the antero-internal cusp. Even if such differences prove constant (which I doubt), I should not be disposed to regard even them as of subspecific value, considering that both Bears come from districts so close to one another as are Yakutat Bay and Sitka. The front claws, as exemplified by a specimen in the British Museum, are long and much curved. 9. URSUS ARCTUS HORRIBILIS.-Grizzly Bear. Ursus horribilis, Ord, iu Guthrie's Geography, 2nd Amer. ed. vol. i. p. 291 (1815) ; Merriam, Proc. Biol. Soc. Washington, vol. x. p. 74 (1896). Ursus cinereus, Desmarest, Maminalogie, vol. i. p. 164 (1820). Ursus ferox, Desmarest (? ex Lewis & Clarke), loc. cit. Ursus (Danls) cinereus, Gray. Cat. Carniv. Brit. Mus. p. 228 (1869). The true Grizzly Bear, ranging from Norton Sound, Alaska, through the northern Bocky Mountains to Utah, is a smaller animal than either of the preceding forms. According to Busk, this Bear (probably in common with some of the preceding N e w World types) differs from U. arctus typicus in the following points:- The j ugal arcade is less of a circle and more of an ellipse; the palate is flatter; the last upper molar is less narrowed behind; the inner tubercle of the upper carnassial is larger; and the fourth lower premolar is larger, and usually has two internal tuberclesl. 1 As already mentioned, tbe second of these tubercles may be present in U. a. typicus, and both are constant in U. a. isabellinus. |