X ELECTRON-MICROSCOPIC STRUCTURE OF PROTOZOA 



complete later publication, the earlier one is not cited unless 

 priority is importantly involved. With the exception of a few 

 papers that were made available to me in manuscript, the 

 coverage of literature terminated with works published in 

 June, 1961. 



The original electron microscopy reported here was supported 

 in part by grants C-5388 and C-4108 from the National Cancer 

 Institute, Public Health Service. I am indebted to many colleagues 

 for indispensable co-operation in the preparation of this book. 

 For their generosity in supplying me with original micrographs — 

 many of them from unpublished work — and for permission to 

 reproduce diagrams, I am deeply grateful to Everett Anderson, 

 H. W. Beams, L. H. Bretschneider, Joan E. Cook, Ruth V. 

 Dippell, Charles F. Ehret, E. Faure-Fremiet, I. R. Gibbons, 

 P. P. Grasse, J. Ludvik, Charles B. Metz, Cecile Noirot, Bela 

 Parducz, Pierre de Puytorac, J. T. Randall, L. E. Roth, C. Rouiller, 

 Maria A. Rudzinska, Ruth Sager, L. Schneider, and K. E. 

 Wohlfarth-Bottermann. I owe thanks for expert photographic 

 assistance to Jerome Baron; for patient persistence in typing and 

 editing to Eleanor Burns ; and for help in ways too numerous to 

 mention to Carolyn G. Smoller, K. K. Sekhri, Joanne Rush, and 

 particularly to my husband, Frank A. Pitelka. Finally, it is a 

 pleasure to express my sincere gratitude for their critical reading 

 of all or parts of the manuscript to William Balamuth, Ellsworth 

 C. Dougherty, and Daniel Mazia. 



