PLASMODROMA, MASTIGOPHQRA, CHRYSOMONADIDA 87 



scales and often spines. Two chromatophores, rod-shaped. 

 Several species. 



Mallomonas ploesslii Perty (Fig. 30,/). Body about 25 to 30 

 microns long. Fresh water. 



Fig. 30 a. Chrysapsis sagene. X750 (After Pascher). 



b-d. Chromiilina pascheri. X 500 (After Hofeneder). 

 b, an individual from a colony; c, d, cysts. 



e. Chrysococcus ornatus. X450 (After Pascher). 



f. Mallomonas ploesslii. X400 (After Klebs). 



g. Synura uvella. X380 (After Stein). 



h. Syncrypta volvox. X325 (After Stein). 



i. Ochromonas mutabilis. X500 (After Senn). 



j. O. ludibunda. X400 (After Pascher). 



k. Uroglena volvox. X325 (After Stein, modified). 



1. Uroglenopsis americana. X350 (After Pascher). 



m. Cyclonexis annularis. X390 (After Stokes). 



Family 2 Isochrysidae Pascher 



Solitary or colonial chrysomonads with two equal flagella; 

 with or without a pellicle (when present, often sculptured) ; some 

 possess a stalk. Several genera. 



Genus Synura Ehrenberg. Spherical colony composed of 



