BIBLIOGRAPHY. 



THE main objects of the following catalogue of works of all kinds 

 which illustrate the statements made in the preceding text, are 



1. To point out the kind of published sources, other than personal 

 observation, from which the author derived the facts that formed the bases 

 of his generalisations ; and 



2. To indicate to the reader, who may desire to supplement the fruit of 

 his own observation or research by comparing it with the result of the 

 inquiry of other labourers in the same field, the sort of guides who may 

 lead him to a continuance of his research in any given direction. 



The following list does not profess to be complete or exhaustive. It is 

 simply typical, being confined to works consulted by the author, and for the 

 character of which he can personally vouch. It gives but a general idea of 

 the number and variety of printed works from which assistance may be 

 sought by that class of students who are fonder of bibliographical research 

 than of the direct investigation of nature. The list of books is confined 

 almost exclusively to those published in Britain and in the English language. 

 But similar works probably abound in every one of the leading countries 

 and languages of the world. They are at all events numerous in Germany 

 and France, and in the German and French languages. So numerous and 

 varied are they in the English language that they might be cited to a per- 

 plexing and wearisome extent. 



The following selected list of works has been alphabetically arranged, 

 according mainly to the names of authors, whose scientific designations, 

 where they possess any, have been added. The object in so doing has 

 been simply this. It is presumable that a Fellow of such learned societies 

 as the Royal Societies of London or Edinburgh, or of the Linnean or Zoolo- 

 gical Societies of London, is competent both to observe and record facts in 

 Natural History ; more competent at least than the uneducated or un- 

 skilled popular writer or compiler. The same remark applies, in a minor 

 degree, to all men of university training and possessed of university degrees 

 such as those of M.A., M.D., LL.D. and D.D. But whether or not such 

 persons are to be considered absolutely trustworthy as the observers and 

 reporters of what they have themselves seen in animated nature, they are 



