74 AZARA'S DOG. 



limbs externally are fulvous, pale yellowish internally. The under- 

 parts of the body are dirty white, and there is more or less white 

 behind the fore limbs and on the inner side of the thighs. A black 

 patch often traverses the outside of either hind leg a little above the heel. 

 The edge of the upper lip, thorax, and chest are white. The chin 

 is black, and this colour may extend backwards beyond the angle of 

 the mouth. The head is of a yellowish colour above. The ears are 

 lined with whitish hairs, while those outside these organs are yellowish 

 brown tipped with black ; the base of the ears and the adjacent parts 

 of the neck are buff colour. The moustaches are long and black. 

 The tail is mottled white and black, and is black at its terminal 

 portion and on the proximal part of its dorsum. 



Habitat. Brazil to Tierra del Fuego, Chile, and Chiloe. 



Centimeters. 



Length from snout to root of tail 66'5 



of tail 33-0 



from heel to end of longest digit 14'0 



of ear 7'0 



Cranial and Dental Characters. 



The sagittal ridge variously developed, its anterior portion is wide 

 and flattened, with a curved margin on either side, so that the two 

 together resemble somewhat the outline of a lyre. 



The fourth upper premolar is well developed compared with the 

 length of the two upper molars. We have found the average of a 

 number of specimens to be as 100 to 118. 



Centimeters. 



Basion to ovalion 2'5 



sphenoideum 3'8 



Sphenoideum to gnathion 8'4 



Length of palate 6'3 



Breadth 3'3 



Length of nasals 4*6 



Breadth 1-0 



