16 



NATURAL HISTORY. 



Fig. 4. -Skeleton of the Ostrich. 



man, and near the head they are small, because the head 

 is so small and therefore light. 



6. In fishes the chain of. vertebras extends through the 

 middle of the body, as you see in Fig. 5. Then there 



Fig. 5 Skeleton of the Perch. 



