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Show *868.] DR. J. E. GRAY ON THE SUIDAE. 41 out in the lower edge of the jaws, and then bent upwards; palate broad. Centuriosus, Gray, P. Z. S. 1862, p. 17. Gyrosus, Gray; Gerrard, Cat. Bones B. M . 1862. Ptychochcerus, Fitz. Sitz. Akad. d. Wissen. 1864. This genus is most allied to Potamochcerus in the form of the skull, and to Sus in its external appearance. It is not likely to be a cross-breed between the two genera. CENTURIOSUS PLICICEPS. B.M. Ears large, flat, rounded at the end, pendulous. Fur with scattered black bristles. Skin blackish grey. Limbs and beneath whitish. Sus (Centuriosus) pliciceps, Gray, P. Z. S. 1861, p. 263, 1862, p. 14, fig. of skull, p. 15, fig. of palate. Sus (Gyrosus) pliciceps, Gray, M S . ; Gerrard, Cat. Bones B. M. p. 278; P. Z. S. 1864, pp. 160, 383. Sus scrofa, var. pliciceps, Sclater, List Vert. Anim. Gard. Zool. Soc. ed. 3. 36 ; P. Z. S. 1862, p. 322. Ptychochcerusplicifrons, Fitz. Sitz. Akad. d. Wissen. 1864, p. 40!); Fiihr. z. Zool. Garten z. Munchen, p. 23. Japanese masked pig, Bartlett, P. Z. S. 1861, p. 263 (figures); Illustr. London News, 1862, no. 1126 (figure). Chinesische Maskenschwein, Schmidt, Zool. Gart. 1862, p. 80. Hab. Japan ; China. Male in the Gardens of the Zoological Society in 1864. Evidently a domestic variety ; the ears are pendulous, like those of most domestic animals. The young are of a uniform colour like the parents, and not striped like the wild species. The skull in the British Museum (no. 1387 a), figured in the ' Proc. Zool. Soc' 1862, is very unlike any of the skulls of the Domestic Pig in the Museum Collection, especially in the breadth of the nose and the rounder form of the tubercle on the base of the sheath of the upper canine. Skeleton of a very old animal (no. 1387 6), from the Zoological Gardens. The forehead between the orbits deeply depressed ; nasal bones very flat. B. ABNORMAL SWINE (Babirussina). Cutting-teeth 4/6 ; intermaxillary and maxilla produced in front, forming a long diastema between the cutting-teeth and the grinders. Canines erect, parallel; the sheath of the upper canine bent up from the base, and closely applied to the side. of the jaw. Premolars ^^; the front one very small, and early deciduous. There are two large oblong deep cavities at the hinder part of the depression behind the hinder nasal opening, separated from each |