THE EUGLENOIDINA OF OHIO 417 



Distribution, Europe. Stagnant pools. 



4. H. spirale Klebs (Fig. 11, PI. XXIV) . 



Cylindrical with 5-6 prominent spiral ridges; periplast 

 smooth; primary flagellum 2 times length of body; secondary 

 tlagellum about % length of body. 



L. 42/x. D. 24-30;x. 



Distribution, Europe. Stagnant pools. 



''5. H. mutabile (Stokes) (Fig. 1, PI. XXV). 



Oval to elongately cylindrical, extremely metabolic ; periplast 

 longitudinally striate ; primary flagellum 14 length of body • sec- 

 ondary flagellum as long as body. 



L. 250;.. D. ( ?) . 



Distribution, North America. Cypress swamps S. Florida 

 Stokes originally placed this in the genus Zygoselmis Duj 

 He notes that 'The incessant alterations in the form of this curious 

 infusorian are indescribable. The food is indiscriminately animal 

 or vegetable. The endoplasm of the individuals observed con- 

 tained desmids, diatomes, and in a single instance a small rotifer " 

 A form which is referred to this species with some hesitation 

 was taken m a culture obtained from the Kokosing River at 

 Gambler, O. 



6. H. klebsii Senn (Fig. 2, PI. XXV) . 



Fusiform, resembling a triangular prism somewhat twisted • 

 longitudinally (?) striate; primary flagellum somewhat longer than 

 the body; secondary flagellum slightly shorter than the bodv 



L. 52-58/.. D. IS,,. 



Distribution, Europe. Peat swamps in Harz Mountains 

 Germany. 



7. H. nebulcsum (Duj.) (Fig. 3, PI. XXV). 



Spherical or oval, with narrow, clear, anterior end ; periplast 

 decidedly striate spirally; primary flagellum 2 times 'length of 

 body; secondary flagellum 1/2 length of body 



L. 40-57/x. D. 10-30/x. 



Distribution, Europe, 



8. H. globiferum Stein (Fig. 4, PI. XXV). 



Oval, rounded or emarginate posteriorly; periplast striate 



