INSTRUCTIONS. 



The present volume contains (a) Schedules and Indexes in four 

 languages; {b) An Antlior Catalog-ue ; (c) A Subject Catalogue. 



The Schedules have been revised in accordance with the decisions 

 of the Interuarional Convention of 1905. 



The Subject Catalogue begins with some geueral sections 0000 to 0220. 

 It is then divided into Palaeozoology and Falaeobotany. Each of these 

 main divisions is sub-divided into three sections. The first section 

 gives the publications arranged according to strata ; in the second 

 section the arrangement is according to fossils ; while the third section 

 gives a list of new genera and species. 



In each section the final arrangement of );»apers is in the 

 alphabetical order of jfuthors' names. 



To find the papers dealing with a particular subject the reader 

 ma}' consult either the Schedule or the Index to the Schedule. 

 The numbers given in the Index are Registration numbers, aud 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 right-hand top corners of 

 the pages. 



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

 to these is provided at the end of the volume. 



The literature indexed is mainly that of 1911, but includes 

 those portions of the literature of 1901-1910 in regard to which the 

 index slips were received by the Central Bureau too late for inclusion in 

 the previous volumes. There are also entries dated 1912. 



Topographical Symbols. 



These symljols are letters printed in italics. They are explained in 

 the Topographical Classification. They are not used instead of 

 Registration numbers, but for sub-dividing the sections. 



