i^'' 



TAWNY EAGLE. 

 I AqijilanaEvroides 



I. ARCH^OPTERYX, 2. TAWNY .EAGLE. 



The tail ot Archseopteryx was made up of a number of separate bones, like a 

 lizard's tail, and each separate bone bore a pair of tail-feathers. In all other birds, 

 e.g. eagle, these separate bones have been shortened and fused into a single plate, 

 causing the tail-feathers to assume a fan-wise arrangement. 

 136] 



