THE EUGLENOIDINA OF OHIO 403 



C- Not flattened. 



Di Stigma present . . ... 3. A. ocellata 



D- Stigma absent. 

 El Cell straight. 



Fi Nucules central . . . 4. A. klebsii 



F- Nucleus posterior . . . 5. A. dangeardii 

 E- Cell lunate ..... 6. A. curvata 



A2 Forms endoparasitic in Cyclops, Catenula, etc. 



Bi Living in Catenula . . . . . . 7. A. captiva 



B- Living in Cyclops 8. A. mobilis 



1. A. lagenula (Schew.) (Fig. 2, PI. XXII). 



Elongate, posterior end extremely broad and rounded, giving 

 a club-like appearance ; periplast smooth ; flagellum as long as 

 body; nucleus central; paramylon granules spherical. 



L. 25-30/.. D. 10/.,. 



Distribution, Malay Archipelago (Island Bali). Ditches. 



2. A. inflata Duj. (Fig. 3, PI. XXII). 



Flattened, short, oval ; periplast strongly striate spirally ; 

 flagellum as long as body ; nucleus central ; paramylon granules 

 rod-like. 



L. 35-46/x. D. 12/1. 



Distribution, cosmopolitan ( ?). Stagnant water. 



*3. A. ocellata Khawk. (Fig. 4, PI. XXII). 



Fusiform or somewhat cylindrical, broadest anteriorly ; peri- 

 plast smooth; flagellum 11/2-2 times length of body; stigma pres- 

 ent ; nucleus central ; paramylon granules spherical or polyhedral. 



Reproduction by cysts with thick membrane. 



L. 35-65^. D. 8-35/x. 



Distribution, cosmopolitan. Standing water. 



Ohio, Mt. Vernon (Hiawatha Lake). 



*4. A. klebsii Lemm. (Fig. 5, PI. XXII). 



Fusiform with posterior tail-like process ; periplast indis- 

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

 nucleus central ; paramylon granules oval. 



L. 50-59/x. D. 13-20/x. 



Distribution, Europe and North America. Stagnant water. 



Gambier, 0., Academy Pond. 



