402 OHIO BIOLOGICAL SURVEY 



L. 49-66/x. D. 3-13^. 



Distribution, cosmopolitan. Standing water and Plankton. 



A variety schizochlora has been described by Entz from ponds 

 containing saline waters in Hungary. The paramylon is absent 

 or in the form of small granules ; reproduction by cysts with a thick 

 membrane. 



2. E. lanowii Steuer (Fig. 1, PI. XXII). 



Fusiform, more elongate than in preceding species, truncate 

 anteriorly, gradually narrowed posteriorly; paramylon spherical 

 or kidney formed. 



Reproduction by division during motile condition and also by 

 cysts with definite membrane. 



L. 25-60/x. D. 3-13/.. 



Distribution, Austria, Trieste (Grand Canal). 



2. Fam. ASTASIIDAE Butschli. 



Free-swimming, radial, non-colonial, colorless forms obtain- 

 ing their nourishment as saprophytes ; green chloroleucites and red 

 stigma absent as a rule; paramylon present; often extremely 

 metabolic. 



The majority of the forms are inhabitants of fresh water, a 

 few, however, being found in salt water. 



TABLE OF GENERA 



Ai Provided with a single flagellum. 



B' Body strongly metabolic .... 1. Gen. Astasia 



B- Body rigid 2. Gen. Menoidium 



A2 Provided with a long and a short flagellum. 



B' Body strongly metabolic .... .3. Gen. Distigma 



B- Body rigid 4. Gen. Sphenomonas 



1. Gen. ASTASIA Dujardin. 



Decidedly metabolic; periplast usually striate; a single fla- 

 gellum; stigma rarely present; reproduction by division during 

 free-swimming stage. 



TABLE OF SPECIES. 



Ai Forms not endoparasitic in Cyclops, Catenula, etc. 



Bi Broadly rounded posteriorly and much narrower an- 

 teriorly 1. A. lagenula 



B- Not broadest posteriorly. 



01 Oval, flattened 2. A. inflata 



