184 PHILOSOPHY OF ZOOLOGY. 



45. GuLO. Glutton or Wolverine. A fold under the 

 tail instead of a scent-bag. Ursus Gulo, Lin. 



The greater number of the plantigrada burrow in the 

 ground, have their fore-legs remarkably strong, and the nails 

 of their fingers produced, with a groove below. 



DIGITIGRADA. 



Support themselves in walking on the extremities of the 

 toes. 



1. Bruising grinders in each jaw. 



a. Two bruising grinders in the upper jaw. 



Two bruising grinders in the lower jaw. Furnished 

 with a small cxEcum *. 

 46. Canis. Pupil circular, diurnal. This genus includes 

 the common dog and its numerous varieties, the wolves and 

 Jackalls. 



47. VuLPEs. Fox. Pupil linear, nocturnal. The species 

 of this genus are more numerous than the preceding. The 

 tail is bushy, the nose more pointed, and the scent stronger. 

 The upper incisors are not so much notched. They burrow 

 in the ground. 



One bruising grinder in the lower jaw. 

 Tongue rough. Claws in part withdrawn in walking. 

 Viverradse. 



Scent-bag pierced by the anus. 



48. Ichneumon. Five fingers and four toes. The scent- 

 bag is large and simple. V. icheumo7i, Lin. 



49. Ryz.'ena. (Iliger.) Four fingers and toes. V. 

 tetradactyla of Gm. 



* There are usually four tearers above, and three below, on each side. 



