3 6 
D1NOSA URS, 
amalgamation which takes place between those bones in birds; while in one 
remarkable American form the metatarsal bones of the foot were reduced, to 
three in number, and had nearly the same relationship to 
one another and to the bones of the ankle as obtains in 
birds. While the megalosaur attained a height, when erect, 
of some 15 feet, the little Compsognathus, of the lithographic 
limestones of Bavaria, did not stand more than 2 feet; and 
there were other equally diminutive forms, both in England 
and the United States, in which the whole backbone was so 
permeated by air-cavities as to be little more than a mere 
shell of bone. 
The Bird-Like The whole of the dinosaurs mentioned 
Group. above agree with one another in possessing a 
pelvis approximating to the crocodilian type; that is to say, 
the pubis or anterior lower bone of this part of the skeleton is inclined down¬ 
wards and forwards, and thus diverges in the form of an inverted V from the 
THE LEFT HUCKLE-BONE AND 
LOWER END OF TIBIA 
OF THE MEGALOSAUR.— 
After Gaudry. 
SKELETON OF THE CLAOSAUR, ONE OF THE BIRD-LIKE DINOSAURS Hat. size). — After Marsll. 
backwaidly and downwardly directed ischium, or posterior lower bone, as shown 
on the figure on p. 3. On the other hand, in the bird-like dinosaurs the main 
