The Ohio Journal of Science 



Vol. XX FEBRUARY, 1920 No. 4 



A PRELIMINARY SURVEY OF THE PROTOZOA OF 



MIRROR LAKE, ON THE OHIO STATE 



UNIVERSITY CAMPUS. 



Mabel E. Stehle. 

 CONTENTS. 



PAGE 



Introduction 89 



Methods of Study 90 



Description of Mirror Lake 91 



Description of the Stations 93 



Systematic Review of the Species Taken 99 



Class Sarcodina 99 



Class Mastigophora 105 



Class Infusoria Ill 



Literature Consulted 126 



INTRODUCTION. 



The present study, while it marks only the beginning of a 

 thorough survey of the protozoan fauna of Mirror Lake, is an 

 attempt to add a little to the sum total of our knowledge 

 regarding the ecological relationships of the Protozoa. The 

 period of study, which extended from early October, 1917, to 

 the end of March, 1918, was clearly too limited to permit 

 drawing any far-reaching conclusions; but even in this limited 

 time it was possible to make many interesting observations, 

 which, it is hoped, will prove of value. 



The classification adopted in this paper is largely that 

 employed by Calkins in his work on "The Protozoa, " published 

 in 1901. 



It is the writer's pleasant duty to thank those who have 

 helped make it possible for her to do this work. She is indebted 

 for much help and many valuable criticisms to Mr. W. J. 

 Kostir, under whose supervision the work was done. Her 

 thanks are due also to the following: To Dr. R. C. Osburn, for 

 naming the fishes of Mirror Lake; to Dr. Freda Detmers, 

 for naming the larger plants; and to Dr. E. N. Transeau, who 

 named the algae. 



89 



