262 



PROTOZOOLOGY 



A. erratica L. (Fig. 106, b, c). Body up to 12/x long; lorica up to 

 30m high; flagellum about four times the body length; Woods Hole. 



Genus Stylochromonas L. Body ovoid, sessile with a stiff stalk: 

 with a large collar at anterior end; a single flagellum; two golden 

 brown chromatophores; no stigma; marine (Lackey, 1940). 



S. minuta L. (Fig. 106, d). Body 5-8 m long; collar about 6/x high; 

 flagellum about twice the body length. 



Fig. 106. a, Microglena ovum, X680 (Conrad); b, c, two views of 

 Angulochrysis erratica, X900 (Lackey); d, Stylochromonas minuta, X1200 

 (Lackey). 



Family 2 Syncryptidae Poche 



Solitary or colonial chrysomonads with 2 equal flagella; 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 con- 

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



S. volvox E. (Fig. 107, a). 8-14 M by 7-12/z; colony 20-70m in diam- 

 eter; in standing water. 



Genus Synura Ehrenberg (Synuropsis Schiller). Spherical or ellip- 

 soidal colony composed 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 di- 

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

 Species (Korshikov, 1929). 



S. uvella E. (Fig. 107, b). Cells oval; bristles conspicuous; 20-40m 

 by 8-17^; colony 100-400^ in diameter; if present in large numbers, 



