MASTIGOPHORA, CHRYSOMONADINA 177 



K. ovum P. (Fig. 85, h). Lorica up to 7n by 4/x. 



Genus Chrysopyxis Stein. With lorica of various forms, more or 

 less flattened; 1-2 chromatophores; a flagellum; attached to algae 

 in fresh water. 



C. cyathus Pascher (Fig. 85, i). One chromatophore; flagellum 

 twice body length; lorica 20-25^ by 12-15/^. 



Genus Cyrtophora Pascher. Body inverted pyramid with 6-8 

 tentacles and a single flagellum; with a contractile stalk; a single 

 chromatophore; a contractile vacuole; fresh water. 



C. pedicellata P. (Fig. 85, j). Body 18-22^ long; tentacles 40- 

 60)u long; stalk 50-80^ long. 



Genus Palatinella Lauterborn. Lorica tubular; body heart- 

 shaped; anterior border with 16-20 tentacles; a single flagellum; 

 a chromatophore; several contractile vacuoles; fresh water. 



P. cyrtopJiora L. (Fig. 85, k). Lorica 80-1 50m long; body 20-25iu 

 by 18-25m; tentacles 50/x long. 



Genus Chrysosphaerella Lauterborn. In spherical colony, in- 

 dividual cell, oval or pyriform, with 2 chromatophores; imbedded 

 in gelatinous mass; fresh water. 



C. longispina L. (Fig. 85, I). Individuals up to 15/x by 9/x; 

 colony up to 250/x in diameter; in standing water rich in vegeta- 

 tion. 



Family 2 Syncryptidae Poche 



Solitary or colonial chrysomonads with 2 equal fiagella; with 

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

 stalk. 



Genus Syncrypta Ehrenberg. Spherical colonies; individuals 

 with 2 lateral chromatophores, embedded in a gelatinous mass; 2 

 contractile vacuoles; without stigma; cysts unknown; fresh water. 



S. volvox E. (Fig. 86, a). 8-Ufx by 7-12ai; colony 20-70m in 

 diameter; in standing water. 



Genus Synura Ehrenberg. Spherical or ellipsoidal colony com- 

 posed of 2-50 ovoid individuals arranged radially; body usually 

 covered by short bristles; 2 chromatophores lateral; no stigma; 

 asexual reproduction of individuals is by longitudinal division; 

 that of colony by bipartition; cysts spherical; fresh water. 



>S. uvella E. (Fig. 86, b). Cells oval; bristles conspicuous; 20- 

 40m by 8-1 7m; colony 100-400m in diameter; if present in large 

 numbers, the organism is said to be responsible for an odor of the 

 water resembhng that of ripe cucumber (Moore). 



