INTRODUCTION. 



The object of this Catalogue has been to give a complete list 

 of all the Species of Intestinal Worms contained in the Collection 

 of the British Museum, with their synonyms, the animals in 

 which they were found, and the source from whence they have 

 been derived. The arrangement followed is that of M. Dujardin, 

 who has paid much attention to this class of animals. 



The basis of the Collection was a series of specimens named 

 by, and procured from, M. Siebold, of Berlin. 



This Catalogue has been prepared, and the new Species de- 

 scribed, by Dr. Baird. 



JOHN EDWARD GRAY. 



British Museum, 

 May 18th, 1853. 



