30 A TAPEWORM. 



unless the tissues of this animal are eaten by another, the final host. 

 The larva, called the cystocercus, is a small bladder-shaped organism 

 with a scolex very similar to that of the adult tapeworm, but inverted 

 into the sack-like portion of the body. When the larva reaches the 

 intestine of the final host this scolex is turned right side out and attaches 

 itself to the wall where it begins to develop the proglottids of the adult 

 individual. 



Exercise 3. Draw the proglottid you have just studied with all the 

 detail you have distinguished. 



