574 ZOOLOGY. 
less, while the palate is armed with rows of strong, sharp 
spines ; the tongue is long and slender, like that of the ant- 
eater, while the body is armed with quills like those of a 
porcupine; the claws are very large and strong, adapted for 
tearing open ant-hills. All the species are from one third 
to one half of a metre (12-19 inches) in length. 
Fig. 496.—Skeleton of the Kangaroo.—From Brehm's Thierleben. 
Sub-class 2. Marsupialia.—These are singular forms, rep- 
resented by the opossum in this country, and the kangaroo, 
with a number of other forms, in Australia. They differ 
from all other mammals in having a pouch (marsupium) for 
the reception of the young immediately upon birth, where 
