The Mastigophora 131 



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Fig. 4. 11. Rhizochrysodina. A. Heliapsis mutabilis Pascher, x550 approx. 

 (after P.). B. Cl>r\'sidiastntm catenatutti Lauterborn, x810 (after Pascher). 

 C. Heliochrysis erodians Pascher, xl380 approx. (after P.). D. H. sphagnicola 

 Pascher, parasitic stage; x610 approx. (after P.). E. Rhizorhrysis planktonica, 

 xl400 (after Pascher). F. Hetcrolag\uion oedogonii Pascher, x3300 (after P.). 

 G. Chrysarachnion insidians Pascher; diagrammatic (after P.). H. Lagynion 

 subovatiim Prescott and Croasdale; x665 (after P. &: C). 



(Fig. 4. 11, A). Chrysidiastrum Lauterborn (Fig. 4. 11, B) shows a strong 

 tendency to produce chains instead of definite nets. 



The family also contains a number of solitary types. Chrysamoeba Klebs inchidcs 

 naked amoeboid forms with a Chromulina-like flagellate stage, as in C. radians (66). 

 Thecate species are assigned to several genera. Hcterolagynion Pascher (Fig. 4. 11, F) 

 includes epiphytic forms, the lorica of which lacks a neck like that in Lagynion (201, 

 211; Fig. 4. 11, H). Eleuthcropyxis Scherffel (248), Plagiorhiza Vascher, Platytheca 

 Stein, Kybotion Pascher, and the colorless Leuknpyxis Pascher resemble Lagynion and 

 Hetcrolagynion in that pseudopodia emerge through a single opening in the lorica 



