40 DR. J. E. GRAY ON THE SUID.E. [Jan. 9, 



The British Museum has a series of thirteen skulls of the Do- 

 mestic Pig ; all have very similar characters (see Gray, P. Z. S. 1862, 

 1 6). They are known by the shortness of the skull, the side of the 

 nose being bluntly keeled ; the cheeks concave, the concavity ex- 

 tending up to the edge of the orbit, and being separated from the 

 aperture of the orbit by only a narrow ridge ; the frontal line is 

 more or less concave. 



The skull of the male has a distinctly marked transverse ridge 

 on the base of the sheath of the upper canine ; in the young male 

 it is only shghtly indicated ;_ in the skull of the female and young 

 pigs it is uot to be seen. 



7\7 a. Skull of an old male from Africa, from the Gambia {Sus 

 gambianvs, Gray, List Mamm. B. M. ; Gerrard, Cat. Bones B. M. 

 277). Forehead flat (see Sus scrofa hybridus, West-African Pig, 

 Sclatcr, P. Z. S. 18C2, p. 32.o). 



7 1 3 A. Skull of an old male, from Africa. Forehead rather convex. 



713 r. A very similar skull of an old male, purchased at a 

 sale. 



713 and 713^. Two nearly adult skulls, from the Museum of 

 Dr. de Jeude. 



713^. A skull of an old specimen, diseased, from the Zoological 

 Society's Gardens. 



716 r. A skull of a young specimen from India, from the Museum 

 of the Zoological Society ; inscribed with Indian characters. Named 

 Sus hidicus. 



713 g. Skull of a yovmg Berkshire Sow. 



713 e. Skull of a young Domestic Pig. 



713 5. The skull of a very young Domestic Pig. This skidl has 

 an abnormality in the cutting-teeth. There are six in the upper 

 jaw ; the first two are in their natural position, and in their proper 

 place ; the two hinder ones on each side are close together, just in 

 front of the suture of the intermaxillary bone, the front one being 

 elongated, slender, conical, and bent outwards, and the hinder one 

 short, broad, conical, and compressed. The canine on the right 

 side is double ; that is to say, the new one has appeared before the 

 old one has been shed. 



713 w. Skull developing its last grinder, from the Museum of Dr. 

 de Jeude. 



713 <. Skull of an adult, with the nose of the skull more elon- 

 gated ; from the Utrecht Collection. Probably half-bred between 

 the Wild Boar and the Domestic Sow ; it has the flat forehead, con- 

 cave facial line, and the keeled side to the nose before the orbit, of 

 the Domestic Pig, and the length of the face like the wild breeds. 



5. Centuriosus. 



Face deeply and symmetrically furrowed. Ears very large, faUing 

 down. Tail moderate. Skull — forehead and upper part of the nose 

 flat, smooth, keeled on the sides ; sides of the cheek concave ; the 

 sheath of the upper canine tubercular above ; upper canines coming 



