68 THE AMERICAN MUSEUM JOURNAL 
and skull, suggests that the animal was amphibious, living chiefly 
in shallow water, where it could wade about on the bottom, 
feeding on the abundant vegetation of the coastal swamps and 
marshes, and pretty much out of reach of the powerful and ac- 
tive Carnivorous Dinosaurs which were its principal enemies. 
Fi@. 4. RESTORATION OF BRONTOSAURUS. BY CHARLES R. KNIGHT 
This restoration represents Professor Osborn’s view of the habits of the animal 
The water would buoy up the massive body and prevent its 
weight from pressing too heavily on the imperfect joints of the 
limb- and foot-bones, which were covered during life with thick 
cartilage, like the joints of whales, seals and other aquatic ani- 
mals. If the full weight of the animal came on these imperfect 
joints, the cartilage would yield and the ends of the bones would 
grind against each other, thus preventing the limb from moving 
without tearing the joint to pieces. The massive, solid lmb- 
and foot-bones weighted the limbs while immersed in water, and 
served the same purpose as the lead in a diver’s shoes, enabling 
the Brontosaurus to walk about firmly and securely under water. 
On the other hand, the joints of the neck and back are ex- 
ceptionally broad, well-fitting and covered with a much thinner 
