286 EXTINCT!) MONSTERS 
but the hind quarters show enormous strength and weight com- 
bined. The tail, also, is very powerful and massive. The fore 
limbs are long, and evidently constructed for the exertion of 
great force. How this force was applied we shall see presently. 
In both sets of limbs we notice powerful claws, such as might 
be used for scratching up the ground near the roots of a tree, 
and ‘it was at one time thought that this was the way in which 
the creature obtained its leafy food, namely, by digging up trees 
by the roots and then devouring the leaves. But Owen had 
another explanation. 
As in the living sloths and armadillos (edentata'), there are no 
teeth in the fore part of the jaw. The molar teeth, of which there 
are five on each side of the upper jaw, and four in the lower, are 
hollow prismatic cylinders, straight, seven to nine inches long, 
and implanted in deep sockets. 
On looking at the model so skilfully set up at South Kensing- 
ton, and especially at the front part of the skull, it will be seen 
that the snout and lips must have been somewhat elongated, 
possibly into a slight proboscis like that of the tapir. The 
specimens of the lower jaw in the wall-case close by show that 
it was much prolonged and grooved. This fact must be inter- 
preted to mean that the creature possessed a long and powerful 
tongue, aided by which it could, like the giraffe, strip off the 
small branches of the trees which it had broken or bent down 
within its reach. 
A bony shield (or carapace) of a great armadillo was found 
with one of the specimens described by Mr. Clift, and Buckland 
and others thought it belonged to the Megatherium ; but Owen 
afterwards showed, by most clear and convincing reasoning from 
1 This word, which means toothless, is misleading. All the Pleistocene and 
existing edentata, however, agree in having no front, or incisor, teeth. Some 
forms from Santa Cruz have front teeth. 
