40 GLIRES. THE RAT TRIBE. 



* With Nails or Claws. 

 3. Two front-teeth in each jaw, and no canine-teeth. 



ORDER IV. GLIRES. 



Front-teeth two in each jaw, standing close together, but 

 at a distance from the grinders. No canine-teeth in either 

 jaw. 



THE RAT TRIBE. Upper front-teeth wedge-shaped : 

 grinders generally three, but sometimes only two on each 

 side of both jaws : collar bones perfect. M us. Linn. Si/st. 

 Nat. Gmel. gen. 24, i. p. 125. 



Front-teeth long. Tail scaly or annulated; naked or 

 thinly clad with hair. Five toes on each of the hind- 

 feet. W. B. 



24. THE NORWAY OR BROWN RAT. Tail very Jong 

 and scaly, hairs stiff, grey on the upper parts of the body, 

 whitish beneath. Mus decumanus. Linn. 



Length, to the origin of the tail, 9 inches ; and of the taik 8 inches. 

 The tail consists of about two hundred rings. Weight from ejght 

 ounces to a pound. Ears dark-coloured and nearly naked. Eyqs 

 large, black, and prominent. All the upper parts of the body are of 

 a tawny grey colour: the belly, insides of the thighs, neck, and end 

 of muzzle whitish. Legs and feet almost naked, and of a dirty flesh- 

 colour. Fore-feet have each four very distinct toes, and a claw in 



place 



