1S68.] DR. J. E. GRAY ON THE SUID^. 21 



flattened above and rather thickened on the upper edge ; con- 

 cavity of the cheeks separated from the orbit by a broad ridge. 

 Males with the upper edge of the nose warty in front, and with 

 a large process from the upper part of the sheath of the canine 

 tooth. Females with only a ridge across the base of the sheath 

 of the canines. 



b. Domesticated Swine. The ears more or less dependent, often 

 very large. Colour black, white, or variegated ; young like 

 parents. Skull short ; facial line sunken ; forehead and top of 

 nose flat ; nose margined on the sides. 



4. ScROFA. Face smooth or nearly so. Skull — sheath of upper 



canine with a longitudinal ridge at the base. 



5. Centuriosus. Face strongly concentrically wrinkled. Skull — 



sheath of upper canine with a large rounded tubercle at the 

 base. 



B. Abnormal Swine (Babirussina). Cutting-teeth 4/6 ; inter- 

 niaxilla and maxilla in front, forming a large diastema between 

 the cutting-teeth and grinders ; canines erect, parallel ; the 

 sheaths of the upper canines bent up from the base, and closely 

 applied to the side of the jaw ; premolars |^, the front ones 

 early deciduous. 



6. Babirussa. 



Fam. 2. Dicotylid^. 



Teeth 38 :— Cutting-teeth ^, the outer lower small ; canines, 

 upper bent downwards ; grinders ^. Back with a gland. Tail 

 none. Teats 2. Toes 4 . 3 ; the outer hinder toes absent. 



Hub. America. 



1. Notophorus. Side of face in front of the orbit dilated, spread 



out. 



2. DicoTYLES. Side of the face in front of the orbit flattened. 



II. The premolars deciduous, their place being occupied by the 

 development of the molars. 



Fam. 3. Phacoch<erid^. 



Teeth variable :— Grinders 6/6 ; premolars ^,, early deciduous ; 

 canines subcyhndrical, upper very large, recurved ; the last molar 

 very large, convex, divided into many conical cusps. Toes 4.4; 

 two hinder on each foot small, shorter. 



Hab. Africa. 



1. Phacochcerus. 



