THE EUGLENOIDINA OF OHIO 399 



49. T. helvetica Lemm. (Fig. 9, PI. XXI). 



Oval, gradually narrowed posteriorly into a spike-like pro- 

 cess; thickly covered with spines; collar present, truncate; fla- 

 gellum( ?). 



L.(?). D.(?). 



Distribution, Europe. Standing water. 



50. T. caudata (Ehrenb.) (Fig. 10, PI. XXI). 



Oval, narrowed slightly posteriorly, thickly covered with 

 spines ; posterior spike present, straight or slightly curved ; collar 

 widened at mouth, provided with teeth; flagellum about as long 



as body. 



L. 29-53/x. D. 21/x. 



Distribution, cosmopolitan. Standing water. 



Palmer notes this as a rare species occurring as a typical 

 form at Tinicum, Pa., the local species having a length of 40/.. 



6. Gen. ASCOGLENA Stein. 



Elongately oval similar to Euglena, but secreting a brownish 

 yellow protective covering which gives it a flask-like form, the 

 posterior end being attached to algae or other aquatic plants or 

 debris in the water. General structure as in Euglena. 



TABLE OF SPECIES. 



Ai Protective envelope elongately cylindrical and slightly 



broadened near the base . . _ • • • 1- A- vaginicola 



A- Protective en\ elope urn shaped, with distinct neck, broad- 

 est near anterior end 2. A. amphoroides 



1. A. vaginicola Stein. (Fig. 11, PI. XXI). 



Body bluntly oval without a pronounced acute tip ; stigma not 

 prominent; chloroleucites 12-15 in number, discoid (?); paramy- 

 lon granules absent ( ?) ; secreting a gelatinous protective envelope 

 which is colored yellow or light brown through the action of iron 

 oxide; individual fixed to bottom of protective envelope which is 

 in turn attached to plant debris, algae, etc. 



L. 43/.. D. 8-16/x. 



Distribution, cosmopolitan ( ?) . 



2. A. amphoroides (France) (Fig. 12, PI. XXI). 



Protective envelope urn-shaped, yellowish brown, with dis- 



