ACTINOPODA, HELIOZOA 



357 

 b 



Fig. 163. a, Actinocoma ramosa, X630 (Penard); b, Adinophrys sol, 

 X400 (Kudo); c, Actinosphaeruim eichhorni, X45 (Kudo); d, Camp- 

 tone tna nutans, X350 (Schaudinn). 



The skeletal structure of the Heliozoa varies among different 

 species. The body may be naked, covered by a gelatinous mantle, 

 or provided with a lattice-test with or without spicules. The spic- 

 ules are variable in form and location and may be used for specific 

 differentiation. In some forms there occur colored bodies bearing 

 chromatophores, which are considered as holophytic Mastigo- 

 phora (p. 24) living in the heliozoans as symbionts. 



The Heliozoa multiply by binary fission or budding. Incom- 

 plete division may result in the formation of colonies, as in 

 Rhaphidiophrys. In Actinosphaerium, nuclear phenomena have 

 been studied by several investigators (p. 156). In Acanthocystis 



