256 ZOOLOGY. 



structures or calcareous shells. They are of no 

 agricultural importance. Here belong: Infusoria, 

 common in putrid solutions ; and Rhizopods, such as 

 Amceba, the Proteus Animalcule (Fig. 149), so called 

 because its shape is constantly altering. 



THE END. 



PRINTED BY WILLIAM CLOWES AND SONS, LIMITED, LONDON AND BECCLES- 



