20 nR. J. E. GRAY ON THE suiDvE. [Jan. 9, 



in turning np the ground. The scrotum posterior, only slightly 

 prominent, just under the vent. 



Setifera, Illiger. 



Pachydermatu Jissipedes, Latr. Reg. Anim. 1830, p. 596. 

 Setigera, Fitz. Sitz. Akad. Wiss, 1864. 



Pachyderma paridigitata, Cuvier, Oss. Foss. ; Burmeister, 1840- 

 184.5. 



Ungulata isodactyla seu artiodacfyla, Owen, Odont. 



" The progressive increase of size in the molar teeth as they are 

 situated further back in the mouth may also be noticed as a family 

 characteristic, which, with the complication of the crown and deve- 

 lopment of the teeth, reaches its maximum in the Phacochceres." — 

 Owen, Odont. 544. 



Synopsis of the Families and Genera. 

 I. The premolars permanent, forming one series with the molars. 



Fam. 1. SuiDiE. 



Teeth 44 or 40 : — Cutting-teeth ^^ ; canines triangular, upper 

 recurved; premolars ^ or |^ ; molars ^, hinder largest. Tail 

 elongate, rarely absent. Teats 10, rarely 8. Toes 4.4; the hinder 

 on each foot shorter, smaller. 



Hah. Europe, Asia, and Africa ; naturalized in America and the 

 Pacific Islands. 



A. Typical Swine (Suina). Cutting-teeth 6/6 ; intermaxillary 

 short ; diastema between the cutting-teeth and grinders short ; 

 canines thick, spread out ; the sheaths of the upper canines 

 spreading out and then bent up at the end ; premolars ~^ ; 

 molars ^. 



a. Wild Swine. Face elongate. The ears erect, moderate, hairy. 

 Colour uniform or grizzled ; young yellow, streaked. Skull 

 elongated ; facial line straight ; forehead convex. 



1. Sus. Ears ovate, hairy. Tail moderate, tufted at the end. 



Skull — nose convex, rounded and smooth on the sides above ; 

 concavity on the cheeks reaching to the edge of the orbit. 

 Male with a ridge across the upper part of the base of the sheath 

 of the canines. 



2. Porcula. Ears ovate, hairy. Tail rudimentary. Skull — nose 



tapering, rather thickened on the edge in front of the orbit. 

 Canines small, spreading ; upper not recurved, without any 

 ridge on the sheath. 



3. Potamochcerus. Ears elongate, tapering, acute, and pencilled 



at the tips. Tail thick, high up on the haunches. Skull — nose 



