PTERODACTYLES 



skeletons of unborn young individuals, showing 

 that the Ichthyosaurus brought forth its young 

 alive. 



We pass on now to even more astonishing 

 reptiles — the extinct order of the pterodactyles 

 or flying reptiles of the Mesozoic period. These 



Fig. 170. — The great Pterodactyle Fterunodon as it a])pfaied in 



flight. 



creatures were as truly aerial as the birds and 

 bats of to-day. They were of many kinds, from 

 the size of a crow to so huge a form as that 

 drawn in Fig. 169, which measured eighteen 

 feet from the tip of one wing to the^tip of the 

 other. Their wings have been found well 



231 



