PSEUDO-HELIOZOA. 



Flagellata. An account of several such forms is given 

 by Penard, in addition to which the following may be 

 noted: < V//o/ /A/;//.-,- Cienkowski has two phases; in the 

 one it appeals as a typical Heliozoon with stiff 

 radiating pseudopodia; in the other it is a typical 

 flagellate. 



" In the process of transformation the Heliozoon- 

 form retracts its pseudopodia, its body becomes 

 amoeboid and a flagellum grows out ; finally the animal 



. 



becomes a pear-shaped flagellate swimming by means 

 of its flagellum (Schewiakoff ; Caullery). 



FIG. 194. Cl'Jtld-dl'i fnn-l'i. 1. Usual appearance. '2. Envelope (partly 

 diagrammatic). 3. Young individual. (After Penard.) 



" Cdiophrys thus recalls Pseudospora in its two 

 phases, and there can be little doubt that the two 

 forms are closely allied." 



After describing _/>////"//>//" innt<i,i* the author pro- 

 ceeds : "These facts appeal 1 to indicate an origin for 

 the Heliozoa from Flagellates such as those of the 



o 



genus Multicilia, in which the body bears radiating 

 flagella planted evenly over the surface ; transforma- 

 tion of the flagella into stiff pseudopodia would pro- 

 duce the Heliozoon-type of organism. On such a view 

 two peculiarities of the Heliozoan pseudopodia receive 

 explanation ; the power of nutation and bending which 



