THE COLD-BLOODED AIR BREATHERS OF THE GLOBE IN TIMES BOTH PAST
AND PRESENT 89
PICTURE-HEADING--Reptiles of the Cretaceous Period. On land
_Iguanodon_, 20 feet high, attacked by _Megalosaurus_; in
the air _Pterodactyls_, or flying lizards; in the water
_Ichthyosaurus_, _Mosasaurus_, and _Teleosaurus_, with
_Plesiosaurus_ in the background. (From various sources.)