132 KANGAROOS AND WALLABIES CHAP. 



prymnus), consists of smaller animals than the Macropodinae, 

 which, however, resemble them in having no hallux, but a hairy 

 tail. The oesophagus enters the stomach near the pyloric end 

 of that organ. The caecum, though short, has lateral longitudinal 

 bands. The liver has no special Spigelian lobe. The canines 

 are always present, being rarely so in Macropodinae, and are 

 usually well developed. 



The third sub-family, that of the HYPSIPRYMNODONTIDAE, is 

 doubtfully referable to the family ; it consists of but one genus 

 Hypsiprymnodon, which is in many points more like a Phalanger 

 than a Kangaroo. It has an opposable hallux and a non- hairy, 

 but scaly, tail. It has canines in the upper jaw. 



Sub-Fam. 1. Macropodinae. The genus Macropus includes 

 not only the Kangaroos but also the Wallabies, which are really 



FIG. 66. Red Kangaroo. Macropus rufus. x ^. 



indistinguishable, though they have sometimes been placed in a 

 separate genus Halmaturus. The genus thus enlarged contains 

 twenty-three species. It may be thus characterised : the ears 

 are long, the rhinarium is usually naked, but in M. giganteus 

 and others a band of hairs descends to the upper lip ; a 

 naked band extends from the ankle to the pads on the digits, 

 which is interrupted in M. rufus by a band of hairs just in front 

 of the digits. The mammae are four. The tail is not bushv, 



