194 PROTOZOOLOGY 



Family 3 Carteriidae 



With four flagella arising from anterior pole. 



Genus Carteria Dicsing (Corhierea, Pithiscus, Dangeard; 

 Teiramastix Korschikoff). Ovoid, chromatophore cup-shaped; 

 pyrenoid; stigma; 2 contractile vacuoles; fresh water. Numerous 

 species. 



C. cordiformis (Carter) (Fig. 92, a). Heart-shaped in front view; 

 ovoid in profile; chromatophore large; 18-23^1 by 16-20;u. 



C. elUpsoidalis Bold. Ellipsoid; chromatophore; a small stigma; 

 division into 2, 4, or 8 individuals in encysted stage; 6-24ju long; 

 fresh water, Maryland (Bold, 1938). 



Genus Pyramimonas Schmarda (Pyramidomonas Stein). 

 Small pyramidal or heart-shaped body; with bluntly drawn-out 

 posterior end; usually 4 ridges in anterior region; 4 flagella; green 

 chromatophores cup-shaped; with or without stigma; with a 

 large pyrenoid in the posterior part; contractile vacuoles in the 

 anterior portion; fresh water. Several species. 



P. tetrarhnnchus S. (Fig. 92, h). 20-28/^ by 12-18yu; fresh water; 

 Wisconsin (Smith, 1933). 



P. montana Geitler. Bluntly conical; anterior end 4-lobed or 

 truncate; posterior end narrowly rounded; plastic; pyriform nu- 

 cleus anterior, closely associated with 4 flagella; stigma; 2 con- 

 tractile vacuoles anterior; chromatophore cup-shaped, granular, 

 with scattered starch grains and oil droplets; a pyrenoid with a 

 ring of small starch grains; 17-22.5^ long (Geitler); 12-20/i by 

 8-16^1 (Bold), flagella about body length; fresh water, Maryland 

 (Bold, 1938). 



Genus Polytomella Aragao. ElHpsoid, or oval, with a small 

 papilla at anterior end, where 4 equally long flagella arise; with 

 stigma; starch; fresh water. 



P. agilis A. (Fig. 92, c, d). Numerous starch grains; 8-18/1 by 

 5-9/i; flagella 12-17/* long; fresh water; hay infusion. 



Genus Medusochloris Pascher. Hollowed hemisphere with 4 

 processes, each bearing a flagellum at its lower edge; a lobed 

 plate-shaped chromatophore; without pyrenoid below convex 

 surface. One species. 



M. phiale P. In salt water pools with decaying algae in the 

 Baltic. 



Genus Spirogonium Pascher. Body spindle-form; membrane 

 delicate; flagella a little longer than body; chromatophore con- 



