XV 



In order to find the papers dealinti' with a particular subject the 

 reader may either consult the Schedule or the Index to the Schedule. 

 The numbers given in the index are Registration numbers, and can be 

 used at once for turning to the proper page of the Subject Index. This 

 is done by looking at the numbers at the top corners of the pages. 



If the reader remember the name of the Author of a paper on a 

 given subject, he will probably find it convenient to refer to the 

 Authors' Catalogue rather than to the Subject Catalogue. 



In the Authors' Catalogue the numbers placed within square brackets 

 at the end of each entry are Registration numbers, and serve to 

 indicate the scope of each paper indexed. The meaning of these 

 numbers will at once be found by reference to the Schedule. 



In the Subject Catalogue the papers referring to each group of 

 animals are dealt with in three ways. There is first a list of the 

 papers arranged in alphabetical order of authors' names, then folllow the 

 same papers arranged according to subject matter, and finally a list of 

 new genera and species. 



In case the abbreviated titles of Journals are not understood, a key 

 to these is provided at the end of the volume. 



GEOGRAPHICAL SYMBOLS. 



When one or two letters printed in italics immediately follow the 

 registration number, these letters denote geographical position. The 

 meaning of these geographical symbols will be found in the system of 

 Topographical Classification which, in this volume, is printed in four 

 languages, and placed at the end of the Subject Catalogue. Thus 

 fg means " occurring in South Africa " or " with reference to 

 South Africa." 



