350 



ANIMALH UF THE PAST 



strange coml^ination of bird and reptile. The bones were 

 hollow, but there were no feathers on the boily. Their 

 wings were leathery like those of a bat; and sometimes they 

 had a long tail ending in a flap. Figure 231 gives an idea 

 of their appearance. 



Fi 



gure 



1)2 sliows a remarkable reptilelike bird just as its 



outlines were found impressed on the rocks. It had winp 



Fio. 232, 



-iicplilclikc bird of mcsozoic times. 



and the whole body was coveix'd with feathers; jjut the 

 mouth, like (hat of a reptile, had teeth, and like a reptile 

 it had a long, jointed tail with feathers along the sides in 

 pairs. This seems (o indicate that the reptiles and iiirds 

 have sprung from the sa.me ancestors. 



Birds. — Birds aiipeaicd during the niesozoic era. Some 

 of them had teeth and some of them liad none. They 

 varied in size from small birtls to those having a height of 



