276 



SUBKINGDOM PROTOZOA. 



ing from contact with foreign substances. Some species are 

 naked, while others are protected by a shell. When particles 



Fig. U69. 



Amoeba radiosa, Rhizopod. 



NummuVltes ataica, Rhizopod. 



of food are wafted into contact with this gelatinous mass, 

 firrger-like processes in some species filamentous, in others 

 blunted shoot out and wrap up the nutritive particles, 

 so completely enveloping them as to appear like a thin 



Fig. UU. 



ForaminifSra in Chalk. 



