176 



RELICS OF PRIMEVAL LIFE 



II; 



illi 

 •III! 



i 4'' 



•III' 



i 





t 



i 



if' 



dllt 



I iii: 



sorp' respects the simplest of animals, yet in other 

 respects they present strange complexities. This 



Ainaeba. Actinophryi. 



From original sketches. 



Biloculina. A many-chambered Fora- Polystomelia. A spiral Foraminifcr. 



iiiiiiircr. Magnified as a trans|>areiil Magiiitied 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 



^ii 



