READING RIDDLES OF THE ROCKS © 123 
having all the information we need. A great 
part of the head, with its formidable looking 
horns, is present, and although the nose is 
gone, we know from other specimens that it, 
too, was armed with a knob, or horn, and that 
the skull ended in a beak, something like that 
of a snapping turtle, though formed by a sep- 
_ arate and extra bone; similarly the end of the 
lower jaw is lacking, but we may be pretty 
certain that it ended in a beak, to match that 
of the skull. The large leg-bones of our speci- 
men are mostly represented, for these being 
among the more solid parts of the skeleton 
are more frequently preserved than any others, 
-and though some are from one side and some 
from another, this matters not. If the hind 
legs were disproportionately long it would in- 
dicate that our animal often or habitually 
walked erect, but as there is only difference 
enough between the fore and hind limbs to 
enable Triceratops to browse comfortably from 
the ground we would naturally place him on 
all fours, even were the skull not so large as to 
make the creature too top-heavy for any other 
mode of locomotion. Were the limbs very 
