THE EUGLENOIDINA OF OHIO 401 



Jennings (1900) notes the species from Cyclops in towings 

 taken 21/2 miles north of Kelly Island, also on Polyarthra platyp- 

 tera and various Crustacea in swamps on S. Bass Island. C. 

 steinii Kent, which Jennings found on Dkiptomns sp. from surface 

 towings in Lake Erie, must be referred to this species. 



2. C. arbuscula Stein (Fig. 14, PI. XXI). 



Oval with basal stalk much longer than the length of the 

 individual and much branched distally, otherwise as in C. vesicu- 

 losum. 



L. 20-30|u. D. 10-17/x. 



Distribution, cosmopolitan. 



-3. C. calvum Stein (Fig. 15, PI. XXI). 



Cylindrical, with a cup-like base longitudinally striate, and 

 with a short thick stalk; flagellum as long as body. 



L. 42-48/-. D. 19-20/-. 



Distribution, cosmopolitan. Plankton and on Crustacea. 



Common at Sandusky on algae and duckweed roots from 

 Biemillers Cove (Landacre). 



8. Gen. EUTREPTIA Perty. 



Form bluntly conical, free-swimming, provided with two fla- 

 gella; posterior end somewhat attenuated when swimming; 

 strongly metabolic with small knot-like swellings appearing ante- 

 riorly and moving posteriorly ; periplast striated ; chloroleucites 

 discoid and without a pyrenoid ; stigma present; nucleus central 

 or slightly anterior; metabolic movements accompanying swim- 

 ming movements as a rule. 



Found in both fresh and salt water. 



TABLE OF SPECIES. 



A' Posterior end of body extended into a tail like appendag:e . 1. E. viridis 

 A- Posterior end of body only slightly narrowed. . . 2. E. lanowii 



1. E. viridis Perty (Fig. 16, PI. XXI). 



Broadly fusiform, emarginate anteriorly, with tail-like 

 appendage posteriorly; each flagellum as long as body; paramylon 

 in the form of round or flattened cylindrical rods. 



Reproduction in resting condition within gelatinous mem- 

 brane. Cysts not known except in the var. schizochJora Entz. 



