PREFACE in 



PREFACE. 



THE English edition of Braun's " Die Tierischen Parasiten des 

 Menschen," produced in 1906, being out of print, the publishers 

 decided to issue another edition based on the translation of .Braun's 

 fourth German edition, which appeared in 1908, to which had been 

 added an appendix by Dr. Otto Seifert on Treatment, etc/ 



When the work was considered with a view to a hew edition, 

 it was found that a vast amount of new matter had to be incorporated, 

 numerous alterations essential for bringing it up to date were necessi- 

 tated, and many omissions were inevitable. The result is that parts ol 

 the book have been rewritten, and, apart from early historical references, 

 the work of Braun has disappeared. This is more particularly the case 

 with the Protozoa section of the present work. The numerous addi- 

 tions, due to the great output of scientific literature and other delays in 

 publication, have led to the book being somewhat less homogeneous 

 than we desired, and have necessitated the use of appendices to 

 allow of the presentation of new facts only recently ascertained. 

 Many new illustrations have been added or substituted for older, less 

 detailed ones. Some of these new figures were drawn specially for 

 this book* 



The first section, on the Protozoa, has been written by Dr. Fantham, 

 there being little of the original text left except parts of the historical 

 portions, and thus the section on Protozoa must be considered as 

 new. The second section, on Worms (except the Acanthocephala, 

 Gordiidae and Hirudinea), has been remodelled by Professor Stephens 

 to such an extent that this, too, must not be looked upon as a 

 translation of Braun's book. With regard to the Arthropoda, 

 much remains as in the last English edition, but some new matter 

 added by Braun in his fourth German edition is included, and much 

 new matter by Mr. Theobald has been incorporated. As regards 

 the Appendix by Dr. Seifert, the first section has been remodelled, 

 but the sections on the Helminthes and the Arthropoda are practically 

 translations of the original. 



The authors desire to express their thanks to Miss A. Porter, D.Sc., 

 J. P. Sharpies, Esq., B.A., M.R.C.S., and H. F. Carter, Esq., F.E.S., 

 for valuable help. They also wish to thank the authors, editors, and 



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