Gmporfanf Tlofice. 



After a pause of five years (Vol. 29 appeared 1916) Volume 30 

 of the Bibliographia Zoologica appears, again. Like many other 

 Institutes of an ideal character, the Concilium Bibliographicum 

 has had to suffer considerably through the war, so that we found 

 it necessary to stop publication, and reduce the work to only col- 

 lecting manuscript for future use; hoping in better time to be able 

 to publish a new Volume and also the card catalogue. 



At last the time appeared to have come, when in the middle 

 of Volume 30 a heavy blow struck us. The man who was the life 

 and soul of the whole undertaking had to lay down his ever ready 

 pen and leave his work. 



The future of the Concilium Bibliographicum has not yet 

 been settled, still we have reasonable hopes thai the Rework of 

 Dr. Field will continue. Sufficient material is at hand for the next 

 volume of the Bibliographia Zoologica. New manuscript is dilli- 

 gently being worked upon. 



For. the 30th Volume we have carefully taken in consideration 

 the literature up to 1920, as far as it can be inserted into the 

 chapters it contains. We wish to have a finish by a certain date, 

 so that, all the material which has already been worked up for 

 the year 1921 will appear in Vol. 31. The readers will be astonished 

 at the great number of old references; these were missing up till 

 now in our collection. As in normal times it was impossible to 

 complete these references we used the inactive period of the last 

 years to collect missing material. 



So we publish Volume 30, for whose appearance so many 

 readers have been waiting in the hope that Volume 31 will soon 

 follow. It is not yet decided if this edition will appear in book or 

 pamphlet form. 



