STRUCTURE AND RELATIONSHIPS OF OPISTHOCELIAN DINOSAURS. 247 
legs of Brachiosaurus indicate that its habits of locomotion were 
entirely quadrupedal. 
6. The foot structure in most opisthoccelians furnishes unmis- 
takable evidence of terrestrial habits. The length of fore limb and 
bodily proportions of Bracliosaurus show that this form was more 
highly specialized for terrestrial habits than any other known member 
-of this order. 
