EXTINCT ANIMALS 



great reptiles disappeared and the great mam- 

 mals gradually appeared and took their place. 

 Some of the forms assumed by the great 



Dinosaurian reptiles are not unlike the forms 

 of the small scaly lizards of to-day (see Figs. 

 137, 138, 139, 140) ; but on the whole the Dino- 

 saurs were more like mammals in shape, stand- 



194 



