STUDIES ON EUGLENAMORPHA HEGNERI N. G., N. 



SP., A EUGLENOID FLAGELLATE FOUND 



IN TADPOLES. 



D. H. WENRICH, 

 DEPARTMENT OF ZOOLOGY, UNIVERSITY OF PENNSYLVANIA. 



CONTENTS. 



Introduction 149 



Materials and Methods 149 



Descriptions and Observations 151 



A. Diagnoses 151 



B. The Two Varieties Compared 152 



C. , Transition Stages 157 



D. Results from Cultures 158 



E. Behavior 160 



Discussion 161 



Summary 165 



References cited 166 



INTRODUCTION. 



In a list of Protozoa to be found in tadpoles Hegner ('22) men- 

 tions the discovery of a Euglena-like flagellate with three flagella 

 together with other euglenoid forms. The writer had also discov- 

 ered the three-flagellated species in tadpoles previous to the publi- 

 cation of Hegner's note and presented a brief account of its struc- 

 ture and variations at the meeting of the American Society of 

 Zoologists, December, 1922 (Wenrich, '23). More recently Heg- 

 ner ('23) has published an account of his observations on this and 

 other euglenoids in tadpoles. Since no description of this organ- 

 ism has been found in previous literature, the name Euglenamor- 

 pha hegneri is proposed for it. It is the purpose of this paper to 

 describe this new species and especially its morphological varia- 

 tions. 



MATERIALS AND METHODS. 



A few years ago the writer began the collection of material for 

 the study of the intestinal Protozoa of American Amphibia, giving 

 especial attention to the flagellates. Every opportunity to obtain 



149 



