which I have not as yet found a trace. Certainly there are 
many published in eastern Europe, and the USSR on which I 
have no information. 
The continued accumulation of ostracod literature has 
made it abundantly clear that no library contains all of the 
literature on ostracodae I have, therefore, indicated with 
each reference in my bibliography, the Library from which I 
obtained my copye 
One of the greatest problems in gathering a library on 
ostracods is the unfortunate habit of many ostracod workers 
of so abbreviating their bibliographic references as to make 
them practically unfindable. They also are listed ina 
manner quite different from that used by librarians in cata- 
loginge I have therefore appended to this volume, a list of 
the serials containing works on ostracod taxonomy, giving 
the titles as they are listed in the Union List of Serials. 
Or if they are not reported by the Union List, I have used 
the headings given by the Royal Society Catalogue of Scientific 
Papers, The Geological Record, London; Geological Literature 
on North America; or Bibliography and Index of Geology Ex- 
clusive of North America, as libraries normally have their 
books catalogued in accordance with these listings, which 
frequently differ greatly from the title page of a particular 
volumee Many journals have changed their titles several times, 
but will be catalogued usually only under the last title, or 
perhaps under the city in which published. With each listing, 
viii 
