PHYTOMONADINA 193 



Genus Korschikoffia Pascher. Elongate pyriform with an 

 undulating outline; anterior end narrow, posterior end more 

 bluntly rounded; plastic; chromatophores in posterior half; 

 stigma absent; contractile vacuole anterior; 2 equally long 

 flagella; nucleus nearly central; salt water. 



K. guttula P. (Fig. 91, e). 6-10^ by 5^; brackish water. 



Genus Furcilla Stokes. U-shape, with 2 posterior processes; in 

 side view somewhat flattened; anterior end with a papilla; 2 

 flagella equally long; 1-2 contractile vacuoles anterior; oil 

 droplets; fresh water. 



F. lohosa S. (Fig. 91,/). ll-14/i long; fresh water. 



Genus Hyalogonium Pascher. Elongate spindle-form; anterior 

 end bluntly rounded; posterior end more pointed; 2 flagella; 

 protoplasm colorless; with starch granules; a stigma; asexual 

 reproduction results in up to 8 daughter cells; fresh water. 



H. klebsi P. (Fig. 91, g). 30-80^ by up to lOfx; stagnant water. 



Genus Polytoma Ehrenberg (Chlamydohlepharis France; Tus- 

 setia Pascher). Ovoid; no chromatophores; membrane yellowish 

 to brown; pyrenoid unobserved; 2 contractile vacuoles; 2 flagella 

 about body length; stigma if present, red or pale-colored; many 

 starch bodies and oil droplets in posterior half of body; asexual 

 reproduction in motile stage; isogamy; saprozoic; in stagnant 

 fresh water. 



P. uvella E. (Figs. 8, e; 91, h). Oval to pyriform; stigma may be 

 absent; 15-30^ by 9-20m. 



Genus Parapolytoma Jameson. Anterior margin obliquely 

 truncate, resembling a cryj^tomonad, but without chromato- 

 phores; without stigma and starch; division into 4 individuals 

 within envelope; fresh water. 



P. satura J. (Fig. 91, i). About 15/i by lO/z; fresh water. 



Family 2 Trichlorididae 



With three flagella. 



Genus Trichloris Scherffel et Pascher. Bean-shape; flagellate 

 side flattened or concave; opposite side convex; chromatophore 

 large, covering convex side; 2 pyrenoids surrounded by starch 

 granules; a stigma near posterior end of chromatophore; nucleus 

 central; numerous contractile vacuoles scattered; 3 flagella near 

 anterior end. 



T. paradoxa S. et P. (Fig. 91, j). 12-15/^ broad by 10-12^ high; 

 flagella up to 30/^ long. 



