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Show 1868.] DR. J. E. G R A Y O N T H E CANID/E. 521 The skull 815 a in the British Museum, out of this skin, is very like that of Urocyon viryinianus in the form of the crown-plate, but it differs from that skull in the bullae of the ear-bones being longer, more ventricose and rounded, and in the last upper tubercular grinder being small and more triangular, narrower on the inner edge. 13. LEUCOCYON. Tail very full and bushy ; soles of feet densely furred. Fur, of the adult, white; of the young, greyish lead-colour. Skull short; nose broad before the orbits. LEUCOCYON LAGOPUS. B.M. Canis lagopus, Linn. Fauna Suec. 4 ; S. N. i. 59; Pallas, Zoogr. Rosso-Asiat. i. 51, t. 5; Tilesius, Nov. Acta Acad. Nat. Cur. xi. 375, t. 47; Blainv. Oste'ogr. t. 5 (skull). C. (Vulpes) lagopus, Rich. F. Bor.-Amer. i. 83, 1829. Vulpes lagopus, Aud. & Bachm. N. A. Quadr. ii. 89,1.121,1829 ; Gray, List Mamm. B. M. 60; Gerrard, Cat. of Bones of Mamm. 88. Renard blanc, Buffon, H. N. Suppl. vii. t. 51. Arctic Eox, Pennant, Shaw. (Skulls 780 a, c, di) Junior? Sooty black. Skull shorter and broader. Canis fuliginosus, Shaw, Zool. i. 351. (Skulls 1316 a, b, c.) Sooty Fox, Pennant. Isatis gris, F. Cuv. Mamm. Lithog. Vulpes fuliginosus, Gerrard, Cat. of Bones of Mamm. 88. V. lagopus (Arctic Fox), Aud. & Bachm. N. A. Quadr. iii. t. 122 ; Baird, Mamm. N. A. 137. Canis isatis, Gmelin, Nov. Comm. Petrop. v. 358. Hab. Arctic region : Newfoundland (Audubon). Var. smaller? Pessez or Golubri. Canis isatis, Gmelin, Nov. Com. Petrop. v. 358 ; Thienem. G. lagopus, Pallas, Zoogr. R.-Asiat. i. 51, t. 5; Tiles. N. Act. Nat. Cur. xi. 3/5, t. 47. C. isatis, Gmelin, Nov. Comm. v. 358 ; Buffon, H. N. xiii. 372 (partly). Hab. North Asia. E. BRISTLE-TAILED FOXES. Tail elongate, covered with soft elongated hair and with a central concealed crest of stiff hairs unmixed with soft fur. Skull-temporal muscles separated by a wide flat crown, narrow at the occiput. 14. UROCYON. Muzzle short. Temporal crests of the skull always widely separated. Postorbital process thin, spread out, concave above. A supplementary tubercle on the lower sectorial. The under jaw with an angular emargination below. Pupil ? Bulla* of ear-bones |