Till PREFACE. 



Entozoaires et des Maladies Yermineiises de V Somme et des Animaux Domestiq}oes . 

 Besides these, *it may not be out of place to particularize Prof. Huxley's transla- 

 tion of Yon Siebold's memoir on Tape and Cystic Worms {Band und Blasen- 

 icimney), and especially, also, Weinland's " Essaj^ on the Tapeworms of Man," 

 written in the English language by its accomplished author. In respect of 

 orig-inal contributions on Entozoa, it were almost invidious to refer to particular 

 articles and papers ; yet I may, perhaps, be permitted to acknowledge the 

 pleasure and profit I have derived from a perusal of the writings of Owen, Busk, 

 Huxley, Thomson, Nelson, Carter, and Bastian. 



The engravings, of this work have been executed with great care. The twenty- 

 one Plates comprise one hundred and fifty-six separate figures, which, with eighty- 

 two Woodcuts, make a total of two hundred and thirty-eight Illustrations. Of 

 these, one hundred and five are derived frora original sources ; forty-three are 

 taken from drawings executed by Mr. Busk ; twenty-four are small figures, in one 

 Plate, from Nelson ; nineteen, mostly large Woodcuts, from Leuckart ; thirteen, 

 more or less completely, from Blanchard ; six from figures by the late Professor 

 W. Smith, of Cork ; six from Van Beneden ; four from Kiichenmeister ; three from 

 Huxley ; two from Eberth ; and one each from Van Ammon, Wilson, Rokitansky, 

 Bristowe and Rainey, Curling, Claperede, Hulke, Lubbock, Bastian, Knoch, J. 

 Harley, and Mosler. To this list may be added also the illustration so ably 

 executed by Mr. Jennens (at p. 124) from a photograph by Dr. Hallifax of 

 Brighton. 



The extended Bibliography attached to this woi^k is the result of a laborious 

 search after entozoological facts, scattered through upwards of twelve hiindred 

 British and American volumes. No one, who has not gone over our home literature 

 after this fashion, could have believed what a multitude of valuable and instructive 

 data lie concealed within the shelves of our public libraries. 



To the council of the Royal College of Surgeons of England, and to Mr. Chatto, 

 their obliging Librarian, I am greatly indebted for the liberal manner in which I 

 have been permitted access to their library ; and only in a less degree are my 

 obligations due to Professor James Beart Simonds, of the Royal Veterinary 

 College, for the free use of his private and valuable collection of professional works. 

 The libraries of the Linnean and Zoological Societies, as well as those of the Mid- 

 dlesex Hospital Medical College und Royal Medico- Chirurgical Societ}^ also 

 supplied me with useful references. 



