THE EUGLENOIDINA OF OHIO 415 



*1. U. cyclostomiis (Stein) (Fig. 4, PI. XXIV). 



Fusiform with anterior end normally flask-like in form ; peri- 

 plast spirally striate; flagellum slightly longer than body; promi- 

 nent rod-like organ present. 



L. 26-50^. D. 17-30^. 



Distribution, cosmopolitan (?). Stagnant pools. 



Ohio, decaying vegetation from Biemiller's Cove, Sandusky 

 (Landacre) . 



2. U. costatus Lemm. (Fig. 5, PI. XXIV). 



Fusiform with pointed tip and several prominent spiral cari- 

 nae ; flagellum less than length of body. 

 L. 35-40/1. D. 12-14/x. 



Distribution, Europe. Ponds containing much vegetation and 

 also in Plankton. 



3. U. alenizini Meresch. (Fig. 6, PI. XXIV). 



Broadly fusiform with more or less blunt ends, the anterior 

 end truncate, posterior rounded; periplast smooth; flagellum 

 slightly longer than body. 



L. 39/1. D. 24/*. 



Distribution, Europe. Stagnant water and water from refuse 

 material. 



4. U. sabulosus Stokes (Fig. 7, PI. XXIV). 



Broadly fusiform, somewhat widened anteriorly and obliquely 

 truncated with contracted neck-like process of the cytopharynx; 

 covered with gelatinous substance containing numerous minute 

 granules ; flagellum as long or longer than body 



L. 58;u. D.(?). 



Distribution, North America. Fresh water with algae. 



This species placed originally in the genus Urceolus by Stokes 

 was later transferred by him to a new genus Urceolopsis. The 

 general structure, however, suggests that it may be replaced in the 

 former genus at least for the present. It swims rapidly. 



6. Gen. HETERONEMA (Duj.) Stein. 



Form elongate, or spherical, usually assuming a more or less 

 twisted appearance; decidedly metabolic; anterior end pointed- 

 provided with two flagella the length of the anterior from 1-2 



