AUTHOR S ABSTRACT OF THIS PAPER ISSUED BY 

 THE BIBLIOGRAPHIC SERVICE, NOVEMBER 7 



THE STRUCTURE AND DIVISION OF TRICHOMONAS 

 MURIS (HARTMANN) 



D. H. WENRICH 



Department of Zoology, University of Pennsylvania 



OXE TEXT FIGURE AND FOUR PLATES (tHIRTT-SIX FIGUREs) 



CONTENTS 



Introduction 119 



Materials and methods 120 



A. Materials 120 



B. Methods 121 



The vegetative individuals 122 



A. Form 122 



B. Size 123 



C. Organization of the cell 125 



D. Differences due to different fixatives 130 



E. Encystment 133 



Division 134 



A. Prophase 134 



1 . The nucleus 134 



2. Chromatic basal rod 137 



3. The new undulating membrane and chromatic margin 137 



4. The blepharoplast ^ 138 



5. Other structures 139 



B. Metaphase 140 



C. Anaphase 141 



D. Telophase 141 



Summary of the more important results 145 



Literature cited 147 



Explanation of plates 148 



INTRODUCTION 



The structure and division processes of various species of 

 Trichomonas have received the attention of several investigators, 

 but there is much disagreement among them regarding details 

 of structure in the vegetative condition and events during division 

 even in the same species. Such differences are very noticeable, 

 for example, in the most extensive accounts in recent years, one 



119 



JOURNAL OF MORPHOLOGY, VOL. 36, NO. 1 



