134 The Mastigophora 



Fig. 4. 13. Euheterochlorina. AD. Chloromeson agile Pascher; successive 

 sta^^es in encystment; schematic (after P.). E, F. Nephrochloris salina Carter, 

 different aspects; E, x2430; F, x2250 (after C). G. Chloromeson parva Carter; 

 stigma, one chromatophore; x2360 (after C). H-J. Olithodiscus liiteus 

 Carter; dorsal, ventral and ventro-lateral views; xl340 (after Carter). K. 

 Cyst of O. hi tens; xl275 (after C). 



endoparasitic in Sphagnum. Encystment of the plasmodium is followed 

 by division into smaller plasmodia or into uninucleate flagellate or amoe- 

 boid stages. 



Suborder 3. Heterocapsina. A palmella is the dominant stage (218) 

 in C hlorosaccus L.uther, Gleochloris Pascher, and Malleodendroyi Pascher. 



Order 3. Cryptomonadida 



These typically biflagellate forms are widely distributed in fresh 

 water and fairly common in salt and brackish waters. Some marine types 

 have been reported as parasites (symbiotes?) in Radiolarida. A rather 

 constant body form, often with dorso-ventral differentiation, is charac- 

 teristic. A ventral groove, or "pharynx," is commonly present. The 

 "pharynx" of Chilomonas, which may represent the primitive condition, 

 is an open groove extending almost to the middle of the body (Fig. 4. 



