THE EUGLENOIDINA OF OHIO 361 



I- Body not metabolic; 

 prolonged posteriorly 

 into an extended 

 acute tip; length, 

 70-80M. . . 30. E. tripteris 



G- Anterior part of body imme- 

 diately in front of stigma 

 approximately one-half the 

 diameter of the median part. 

 H^ Posterior end not de- 

 veloped into a needle- 

 like tip . . 31. E. acus 

 H- Posterior end developed 

 into a needle-like tip. 

 P Chloroleucites not spir- 

 ally ai-ranged; length, 

 80m. . . . 32. E. limnophila 

 T- Chloroleucites spirally 



arranged; length 125m 33. E. acutissima 

 E- Periplast covered with prominent punc- 

 tuations, arranged either spirally or 

 longitudinally. 



Fi Flagellum short; punctuations ar- 

 ranged spirally. ... 34. E. spirogyra 

 F- Flagellum as long as body; punc- 

 tuations, arranged longitudinally 35. E. fusca 

 1)- Posterior part of body with a rounded or 

 truncate tip. 



E^ Paramylon granules in the form of 

 elongate rods; tip of body rounded; 

 length, 250-300M. ... 36, E. ehrenbergii 



E- Paramylon granules not rod-like; tip 



truncate or emarginate; length, 175m. 37. E. truncata 

 A~ Chloroleucites apparently absent and the individuals col- 

 orless; stigma yellow to orange brown. . . 38. E. quartana 



-1. E. viridis Ehrenb (Fig. 1, PI. XII). 



Oval or fusiform ; periplast striated spirally ; flagellum as long 

 as body; stigma prominent; nucleus posterior; chloroleucites in 

 the form of elongated rods collected into a median stellate mass; 

 paramylon granules small, round or oval, with pyrenoids. 



Reproduction by longitudinal division or by encystment in a 

 spherical state with thickened membrane colored a yellowish 

 brown. 



Species from Ohio. 



