AUTHORS PREFACE. VU 



cannot be arranged in a subphylum, as the former are evolved 

 from the Flagellata and the latter from the Sarcodina : so in 

 deference to the usage among English authors, the group i& 

 described as a single class and is subdivided into a number 

 of independent subclasses. A short account of the principal 

 methods employed in the study of Sporozoa has also been 

 given. 



A volume such as this is bound to incorporate very largely 

 the work of others, and my grateful acknowledgements are 

 due to all those whose works have been drawn upon, and 

 especially to Minchin, Wenyon, Hartmann, Reichenow, Calkins, 

 Hegner, and Kudo. Where available, figures have been given 

 for the species dealt with. A certain number of these are 

 taken from my own work, but a large number have been 

 borrowed with the kind permission of the authors or publishers 

 concerned. Mj^^ thanks are due to the editors and publishers 

 of journals and text-books who have given permission to 

 reproduce the figures, and due acknowledgement is made in 

 every case by giving the name of the author from whom the 

 figure has been copied. 



My special thanks are due to Dr. B. Prashad, Director of 

 the Zoological Survey of India, for special facilities given to 

 me on the occasion of several visits to Calcutta to consult 

 the literature in the splendid library maintained by the 

 Zoological Survey of India ; and also to Dr. S. L. Hora for 

 his help in getting some figures copied under his supervision 

 by the artists working under him. Finally, I have to offer 

 my most grateful thanks to the Editor, Lieut. -Colonel R. B. 

 Seymour SeweU, C.I.E., F.R.S., for a thorough and critical 

 revision of the text, and for generous help and guidance during 

 the production of this work. 



B. L. BHATIA. 



Hotu Singh Road, Lahore, 

 July, 1938. 



