UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



ZOOLOGY 



Vol. 20, No. 1, pp. 1-20, plates 1-2, 1 figure in text July 14, 1919 



STUDIES ON THE PARASITES OF THE TER- 

 MITES I. ON STREBLOMASTIX STRIX, A 

 POLYMASTIGOTE FLAGELLATE WITH 

 A LINEAR PLASMODIAL PHASE 



BY 



CHARLES ATWOOD KOFOID and OLIVE SWEZY 



CONTENTS 



PAGE 



Introduction 1 



Material 2 



Technique 3 



Occurrence 4 



Morphology 4 



Size and shape of body .5 



Cytoplasm 7 



Neuromotor apparatus 7 



Direction of torsion 9 



Nucleus 10 



Binary fission 10 



Multiple fission 12 



Adaptations 13 



Relationships 14 



Summary 16 



Literature cited _ _ 17 



Explanation of plates 18 



INTRODUCTION 



One of the most curious and unique faunal associations to be found 

 among the parasitic Protozoa is the group parasitic or commensal 

 in the intestinal tract of the social termites. These parasites are 

 remarkable not only for the vast numbers that may be found within 

 a single host, but also for the degi-ee of development and specialization 

 which distinguishes many of the species. This is especially true of the 



