FLYING DRAGONS 
207 
wing. Some of the Continental museums contain good collections 
of fossil Pterodactyls ; but the largest collection in the world is 
that of Yale College, where Professor Marsh declares there are 
Fig. 76. — Skull of Pteranodon. 1. Side view. 2. Top view. (After Marsh.) 
the remains of six hundred individuals from the American 
Cretaceous rocks alone ! 
Some of the fragmentary remains from our Cambridge Green- 
sand formation indicate Pterodactyls of enormous size. Thus 
the neck-vertebrse of one species measure two inches in length, 
while portions of arm-bones are three inches broad. It is 
Fig. 77. — Skeleton of a toothless Flying Reptile {Ptermwdoji occidentalis), from 
the Upper Cretaceous of Kansas, U.S.A. Natural History Museum. 
probable that the creatures to which these bones once belonged 
measured eighteen or twenty feet from tip to tip of the wings. 
Other also fragmentary remains from the chalk of Kent testify to 
the existence of Pterodactyls during that period fully equal in 
size. 
