18f)8.] DR. J. E. GRAY ON THE SUID.E. 41 



out in the lower edge of the jaws, and then bent upwards ; palate 

 broad. 



Centurios^is, Gray, P. Z. S. 1862, p. 17. 

 Gyrosns, Gray; Gerrard, Cat. Bones B. M. 1862. 

 Ptychochcerxis, 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 scat- 

 tered 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. 1.5, fig. of palate. 



Sus (Gyrosus) pliciceps, Gray, MS. ; Gerrard, Cat. Bones B. M. 

 p. 278 ; P. Z. S. 1864, pp. 160, 383. 



Sus scro/a, var. pliciceps, Sclater, List Vert. Anim. Gard. Zonl. 

 Soc. ed. 3. 36 ; P. Z. S. 1862, p. 322. 



Ptychochcerus plicifrons, Fitz. Sitz. Akad. d. "Wissen. 1 864, p. 40!) ; 

 Fiihr. z. Zool. Garten z. Miinehen, 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 So- 

 ciety in 1864. 



Evidently a domestic variety ; the ears are pendulous, like those 

 of most domestic animals. The young are of a imiform 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 unhke any of the skulls of the Do- 

 mestic 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 i), from the Zoological 

 Gardens. The forehead between the orbits deeply depressed ; nasal 

 bones very flat. 



B. Abnormal Swine (Babirussina). 



Cutting-teeth 4/6 ; intertnaxillary and maxilla produced in front, 

 forming a long diastema hetiveen 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 gEj / the front one very small, and early 



3 3 



. jrremoiurs 

 deciduous 



There are two large oblong deep cavities at the hinder part of the 

 depression behind the hinder nasal opening, separated from each 



