Dinosauria. 
PLATE 81. 
Fre. 
1. Neural surface of centrum of anterior trunk-vertebra of Olondrosteosaurus gigas : 
two thirds nat. size. 
2. Hind surface of anterior trunk-vertebra of an Eagle (Halietus albicilla) : nat. size, 
3. Neural surface of the centrum of the same vertebra : nat. size. 
The subject of fig. 1 is from the Wealden of the Isle of Wight. In the British 
Museum. 
