VERTEBRATES 133 



3. Poisonous snakes found in the United States. The 

 poison fangs of a rattlesnake. Habits of the rattlesnake. 



4. Cures for snake bites, fabled and real. \ 



5. Snake charming. 



6. Famous poisonous snakes and their habits. 



7. The characteristics and habits of alhgators. 



8. The characteristics and habits of marine turtles. 

 How they differ from pond turtles. 



9. For what is each of the following noted.' Where 

 does it live.' The terrapins? the horned toad.' the Gila 

 monster .' the chameleon ? the glass snake .' 



10. Reptiles of former (geological) times compared with 

 those of the present. 



11. Care of eggs and young. Swallowing of young by 

 snakes. 



12. Food of snakes. Defend the proposition that non- 

 poisonous snakes are beneficial and should not be killed 

 wantonly. 



13. Investigate and write an account of the economic 

 value of reptiles. 



D. Studies of Birds 

 Vertebrates specialized for Flight 



The Living Pigeon 

 Materials. 



Living pigeons in cages, and, if practicable, other birds 

 such as chickens, canaries, and sparrows. 



The Body. i. What divisions of the body are present .' 

 Compare the relative size of these divisions with that of 

 other vertebrates studied. Can you account for the great 

 increase in bulk of the trunk over the other divisions .' 

 How do you account for the longer neck .' 



