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HANDBOOK OF PROTOZOOLOGY 



Family 5 Silicoflagellidae Borgert 



Exclusively marine planktons. With silicious skeleton which 

 envelops the body. Example: Distephanus speculum (Miiller) 

 (Fig. 31, g). 



Fig. 31 a. Dinobryon sertularia. X500 (After Scherffel and Senn). 



b. Hyalobryott ramosum. X400 (After Lauterborn). 



c. Pontosphaera haeckeli. X800 (After Kiihn). 



d. Discosphaera tubifer. X500 (After Kiihn). 



e. Distephanus speculum. X400 (After Kiihn). 



f. Rhizochrysis scherffeli. X500 (After Doflein). 



g-i. Hydrurus foetidus. g, an entire colony (after Berthold); h, a 

 portion (X250 after Klebs); i, cyst (X600 after Klebs). 



Suborder 2 Rhizochrysidina Pascher 



No flagellate stage is known to occur. The organism possesses 

 pseudopodia. Highly provisional group, based wholly upon the 

 absence of flagella. Naked or with test; various forms. In some 

 species chromatophores are entirely lacking, so that the or- 

 ganisms resemble some members of the Sarcodina. Several 

 genera. 



