96 ANIMALS OF THE PAST 
before whose huge frames 
the bones of the Mam- 
moth, that familiar by- 
word for all things great, 
seem slight. 
For Brontosaurus, the 
Thunder Lizard, beneath 
whose mighty tread the 
earth shook, and his kin- 
dred were from 40 to 60 
feet long and 10 to 14 feet 
high, their thigh bones 
measuring 5 to 6 feet in 
length, being the largest 
single bones known to 
us, while some of the 
vertebree were 43 feet 
high, exceeding in dimen- 
sions those of a whale. 
The group to 
which Brontosaurus 
belongs, including 
Diplodocus and 
| Fig. 19.—A Hind Leg~ Morosaurus, is dis- 
of the Great Brontosaurus, tin ished by a 
the Largest of the Dinosaurs. ew y 
