88 HANDBOOK OF PROTOZOOLOGY 



two to fifty ovoid individuals arranged radially. Body usually 

 covered by short bristles. Two chromatophores lateral; no 

 stigma. Asexual reproduction of individuals is by longitudinal 

 division; that of a colony by bipartition. Cysts are spherical. 



Synura uvella Ehrenberg (Fig. 30, g). Fresh water. If 

 present in large numbers, the organism is said to be responsible 

 for an odor of the water resembling that of ripe cucumber 

 (Moore). 



Genus Syncrypta Ehrenberg. Spherical colonies; individ- 

 uals with two lateral chromatophores, are embedded in a gela- 

 tinous mass. Cysts unknown. 



Syncrypta volvox Ehrenberg (Fig. 30, h). In standing water. 



Family 3 Ochromonadidae Pascher 



With two unequal flagella. The body has no pellicle and is 

 therefore changeable. Contractile vacuoles are simple; with or 

 without delicate test. Solitary or colonial. Free-swimming or 

 attached. 



Genus Ochromonas Wysotzki. Solitary or colonial. Body 

 surface is delicate; posterior end is often drawn out for attach- 

 ment. One or two chromatophores; usually with a stigma. 

 Encystment. 



Ochromonas mutahilis Klebs (Fig. 30, i). About 15 microns in 

 diameter. 



Ochromonas liidibunda Pascher (Fig. 30, j). Body about 15 

 microns long. 



Genus Uroglena Ehrenberg. Spherical or ovoidal colonies, 

 composed of ovoid or ellipsoidal individuals arranged along the 

 periphery of a spherical gelatinous mass. All individuals are 

 connected with one another by gelatinous processes running 

 inward and meeting in a point. With a stigma and a plate-like 

 chromatophore. Asexual reproduction of individuals by longi- 

 tudinal fission; that of a colony by bipartition. Spherical cysts 

 with spinous projections, and a long tubular process. 



Uroglena volvox Ehrenberg (Fig. 30, k). In standing water. 



Genus Uroglenopsis Lemmermann. Similar to Uroglena, 

 but individuals without inner connecting processes. 



Uroglenopsis americana (Calkins) (Fig. 30, 1). When present 



