178 



BIOLOGY OF THE PROTOZOA 



radiate out from the body in the surrounding water as in Actinobolvs 

 radians or in Suctoria, until a victim comes in contact with one or 

 more of the outstretched processes (Fig. 81, p. 154); in the same 

 way axopodia of the HeHozoa capture chance organisms which 

 serve as food (Fig. 88). 





w 





V -i i V. k -. ;^ * N '■■'. !' ; . 



'^->.-< 4f:!:^"'i.-i^ f//-/ 



--- z> 



- s 



Fig. 87. — Allogromia oviforme, foianiiniferon with chitinous monothalamous shell 

 and reticiilose pseudopodia. (D) a recently captured diatom; (S) chitinous shell. 

 (From Calkins after M. Schultze.) 



The most interesting of these holozoic types are the predatory 

 forms which hunt their prey and capture them, while in full motion. 

 The small, but powerful ciliate, Didinium nasutnm belongs in 

 this group. It darts here and there with an eccentric movement 



