94 Practical Zoology. 



cealed? Open the body cavity. Is the digestive tube long or 

 short as compared with that of the frog? What reason for this? 

 Can you find any traces of gills ? Of lungs? Is there a backbone? 

 Do you find a brain and spinal cord? 



Make a series of drawings showing the different stages of 

 development. 



Topics for Reports. Frogs as Food. The Axolotl. Value of 

 Toads. The Tree Toad. 



Read American Natural History, Hornaday. 



