THE EUGLENOIDINA OF OHIO 369 



-24. E. deses Ehrenb. (Fig. 1, PL XIV). 



Elongately cylindrical or band-like in form with short tip, 

 metabolic; periplast weakly striate spirally; flagellum short; 

 nucleus large, oval, central ; stigma prominent ; chloroleucites 

 numerous, disciform ; pyrenoids without shell ; paramylon in the 

 form of short or elongate rods. 



Reproduction by division with or without encystment in a 

 gelatinous covering. 



L. 70-200/x. D. 17-24^. 



Distribution, cosmopolitan. Gambler, 0. 



The species is not free swimming but constantly undergoing 

 contortions. 



25. E. mutabilis Schmitz (Fig. 2, PI. XIV). 



Elongately cylindrical, slightly narrowed anteriorly, tip elon- 

 gate, decidedly metabolic ; periplast smooth ; flagellum ( ?) ; chloro- 

 leucites 2-4 in number in the form of entire or a single half of 

 hollow cylinders ; pyrenoids 2, without shell ; paramylon small, 

 rod-like or disk-like. 



Reproduction by cysts, fusiform or cask-like in appearance. 



L. 80-90;u. D. Ifj.. 



A species particularly noticeable by reason of its comparative 

 length. 



26. E. spiroides Lemm. (Fig. 3, PL XIV). 



Spirally twisted in the form of an elongate band with tip at 

 a pronounced angle ; periplast weakly striate longitudinally ; flagel- 

 lum short; nucleus central (?) ; chloroleucites numerous, disciform; 

 pyrenoids absent; paramylon round, small. 



Reproduction ( ?). 



L. 60-170/x. D. 16;u. 



Distribution, Europe. 



^:=27. E. oxyuris Schmarda (Fig. 4, PL XIV). 



Extremely elongate cylindrical or slightly flattened, rounded 

 anteriorly, posteriorly with elongate tip, form usually twisted ; 

 periplast decidedly striate spirally; flagellum 1/2 length of body; 

 nucleus central ; chloroleucites numerous, disciform ; pyrenoids ab- 

 sent; paramylon in the form of 2 large annular elongate rings, 

 one anterior, the other posterior to the nucleus. 



