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RELICS OF PRIMEVAL LIFE 



some respects the simplest of animals, yet in other 

 respects they present strange complexities. This 



Amoeba. 



Actinophrys. 

 From original sketches. 



Biloculina. A many-chambered Fora- Polystotnelia. A spiral^ Foraminifer. 



niinifer. Magnified as a transparent Magnified as an opaque object, 

 object. 



Fig. 46. — Recent Protozoa. 



is more especially evident in their tests or cover- 

 ings, made for the most part of limestone or 

 calcium carbonate, but sometimes of grains of fine 



