404 OHIO BIOLOGICAL SURVEY 



5. A. dangeardii Lemm. (Fig. 6, PI. XXII). 



Oval or fusiform, broadest anteriorly; periplast distinctly 

 striate spirally ; flagellum as long as body ; stigma absent ; nucleus 

 posterior; paramylon granules oval. 



Reproduction by oval cysts with thin membrane. 



L. 30-58^. D. 12-20/.. 



Distribution, cosmopolitan. Stagnant water. 



6. A. curvata Klebs (Fig. 7, PI. XXII) . 



Elongately cresentic, narrow, usually twisted or somewhat 

 flattened with ends attenuated, truncate anteriorly; periplast 

 weakly striate spirally ; flagellum about 2/3 length of body ; stigma 

 absent; paramylon extremely small, elongate. 



Reproduction (?). 



L. 40-46^. D. 5-6/x. 



Distribution, cosmopolitan. Stagnant water, cultures of 



algae, etc. 



7. A. captiva Beauch. (Fig. 8, PI. XXII) . 



Elongately fusiform with rounded posterior end; periplast 

 spirally striate ; flagellum as long as body or absent ; stigma rudi- 

 mentary ; nucleus central; paramylon granules round or in the 

 form of elongate rods. 



L. 30-40/1. D.(?). 



Distribution, France. Endoparasitic in Catenula lemnae. 



8. A. mobilis (Rehberg) (Fig. 9, PI. XXII). 



Fusiform with pointed posterior end; periplast finely striate 

 spirally; stigma present (?) ; nucleus anterior or posterior; para- 

 mylon round or rod-like; flagellum lV-2 times length of body or 

 absent. 



L. 26-32^. 



Distribution, Europe. Endoparasitic in Cyclops and in the 

 eggs of the Qg^ sack. 



Rehberg described a form as Lagenella mobilis with a length 

 of 102-103/x which was often of a green color. Alexieff has also 

 noted a species which may be identical with A. mobilis. 



2. Gen. MENOIDIUM Perty. 



Body not metabolic, usually somewhat curved in longitudinal 

 axis ; nucleus central or slightly posterior to central area ; pellicula 



