COPROZOIC PROTOZOA 6i 



SARCODINA 



Diniastiganuvba gnibcri (Schardinger) Alexeieff, 1912. 



Description : active am-ccba, y/x to 15/x in diameter when rounded up, 

 single vesicular nucleus 3/x to 4fi in diameter with central karyosome and 

 sparse granules of "peripheral chromatin," single contractile vacuole, several 

 large clear pseudopodia predominantly ectoplasmic while in motion, endo- 

 plasm containing ingested bacteria; cysts, spherical 8/i to 12/i in diameter, 

 translucent, free from food and contractile vacuoles, uninucleate, containing 

 several large spherical chromatoid bodies when first formed, cyst wall 

 double, outer wall perforated by from three to eight pores; Hagellate stage, 

 slightly smaller than active amoeba, oval, with two equal, anterior flagella, 

 produced by flooding culture of amoebae with distilled water and exposing 

 to air. Found in soil, water and feces. 



Trimastigamocba pJiiUppincnsis \Miitmore, 191 1. 



Descriptions a flagellating amoeba similar to Dimustigamoeha gruberi 

 except that it has three instead of two flagella, described from human feces 

 by Whitmore (1911). 



Teframifus rostrafiis Perty, 1852. 



Description : active amoeba, 14/i to 48^ long, single contractile vacuole, 

 vesicular nucleus with central karyosome and "peripheral chromatin," 

 usually a single lobose pseudopodium ; cyst, spherical, 6/1 to i8/x in diameter, 

 usually uninucleate (rarely bi-, tri- or quadrinucleate), cyst wall smooth 

 and thin ; flagellate stage, conical with apex directed posteriorly, 14/x to 18^ 

 in length and 7/x to lO/x in greatest width, single nucleus and contractile 

 vacuole, four anterior flagella, cytostome, flagellate form always derived 

 from amoebic phase. 



HartuiaucUa liyalina (Dangeard) Alexeieff, 1912. 



Description : trophozoite, g/j. to 15/1 in diameter when rounded, single 

 contractile vacuole, single vesicular nucleus with central karyosome and 

 peripheral chromatin ; cyst, spherical, lO/i to 14/1 in diameter, uninucleate, 

 double wall, inner wall thin and smooth, outer wall thick, wrinkled, and 

 brownish. 



Sappinia diploidca (Hartmann and Xagler) Alexeieff, 1912. 



Description : trophozoite, lo/x to 30/i in diameter when rounded, pellicle 

 thick, smooth, and hyaline (rarely wrinkled), two vesicular nuclei with 

 large central karyosome, single contractile vacuole ; cyst, formed by two 

 individuals, spherical, 12/i to 18^11 in diameter, walls thick and uniform, 

 single binucleate form emerges from cyst. 



Chlamydophrys sfcrcorca Cienkowski, 1876. 



Description : shelled amoeba, about 20/i by 14/x, shell oval, white, por- 

 celaneous, thin, smooth, open at pointed end, pseudopodia filose, single 

 vesicular nucleus with spherical karyosome; naked amoeba, somewhat 

 smaller, resembles "limax" amoebae; cysts, may be formed either from 

 shelled or naked amoebae, uninucleate, walls thick, irregular, and brownish. 



