94 ANIMALS OF THE PAST 
Brontosaurus, in some respects the biggest 
brute that ever walked, was but little better off, 
and Triceratops, and his relatives, creatures 
having twice the bulk of an elephant, weighing 
probably over ten tons, possessed a brain weigh- 
ing not over two pounds ! 
How much of what we term intelligence 
could such a creature possess — what was the 
extent of its reasoning powers? Judging from 
our own standpoint and the small amount of — 
intellect apparent in some humans with much 
larger brains, these big reptiles must have — 
known just about enough to have eaten when 
they were hungry, anything more was super- 
fluous. | 
However, intelligence is one thing, life an- 
other, and the spinal cord, with its supply of © 
nerve-substance, doubtless looked after the © 
mere mechanical functions of life; and while — 
even the spinal cord is in many cases quite 
small, in some places, particularly in the sacral 
region, it is subject to considerable enlarge- 
ment. This is notably true of Stegosaurus, 
where the sacral enlargement is twenty times 
the bulk of the puny brain —a fact noted by — 
ie sw < 
ae ry i > 
