1. Bat. 6. Breast Bone of Swan. 



2. Butterfly. 7. „ „ Pigeon. 



3. Beetle. 8. „ „ Pelican. 



4. Dragon-Fly. 9 & 10. Apteryx, Cassowary (degenerate wings). 



5. Bone of Bird's Wing, showing the Three Divisions, 



Arm — Forearm — Hand. 



33 



