THE DINOSAURS 97 
large, though rather short, body, very long 
neck and tail, and, for the size of the animal, 
a very small head. In fact, the head was so 
small and, in the case of Diplodocus, so poorly 
provided with teeth that it must 
have been quite a task, or a long- 
continued pleasure, according to 
the state of its di- 
gestive apparatus, 
for the animal to 
have eaten its daily 
meal. 
An elephant 
weighing 5 tons 
eats 100 pounds of 
hay and 25 pounds 
of grain for his 
day’s ration ; but, saul kg 4 
asthis foodisina eS 
comparatively con- Fig. 20.—A Single Vertebra of 
centrated form, it | pron tosanrus, 
would require at least twice ‘this weight of 
green fodder. 
It is a difficult matter to estimate the weight 
of a live Diplodocus or a Brontosaurus, but it 
