28 STUDIES OF ANIMAL LIFE. 



bits of paper. Cover the box with a glass plate 

 and keep the soil in a moist condition. 

 Make daily observations for two weeks and keep a 

 written record of all you observe, giving special 

 attention to the following questions. 



a. What was the first evidence that the worms had 



come to the surface ? 

 h. How long before the food materials began to 



disappear ? 



c. What disappeared first ? What last ? 



d. Was the food eaten on the surface or carried 



below the soil to be eaten ? 



e. When do the worms get the food, in daytime or 



night-time ? Why ? 

 /. What is the final appearance of the surface of 



the soil ? 

 g. How have the earthworms changed the character 



of the soil ? 



B. General Observations. 



(Use live specimens. Preserved specimens should 

 only be used for comparison.) 



1. What is the shape of the body ? 



2. .What is the length ? (As it is difficult to measure 



a crawling worm, take the average of at least three 

 measur em ents . ) 



3. What is the color ? 



Would any other color do just as well for the earth- 

 worm ? Why ? 



4. Identify the mouth. 



Why is this an advantageous position for the mouth 

 of this worm ? 



