1898] NOTES AND COMMENTS 229 



The prices are undoubtedly cheap ; even if one's subject necessitates 

 less than 100 references j9c?- annum, the cards cost only 5 centimes 

 apiece. 8000 references can be had for 39 francs. This reduction 

 in price is rendered possible by the office having established its ovs^n 

 printing press, and this will, it is hoped, enable the cards to be sent 

 out with greater punctuality than has hitherto been possible. It is 

 exceedingly unfortunate that the skilled typographer who was en- 

 gaged should have been confined to the hospital for three weeks ; 

 but even this did not prevent the energetic Dr Field and his assist- 

 ants from issuing no less than 200,000 cards from the press during 

 December last. Some day it is possible that the international 

 committee, convoked by the Eoyal Society, may provide zoologists 

 with a complete and up-to-date subject catalogue ; but even then, 

 so far as we are acquainted with the plans that have been put for- 

 ward, they do not propose to enter into one-hundredth part of the 

 detail that is already possible to Dr Field. For the present, there- 

 fore, zoologists may be warmly recommended to consult their own 

 advantage, and to assist a practical and useful work by subscribing 

 to the Concilium Bibliographicum on the principle of ' no results, 

 no pay.' 



British Naturalists 



We have received from Mr L. Upcott Gill the " Naturalists' 

 Directory " for 1898. We are glad to see that a few more naturalists 

 whose names are known to us have found their way into this issue, 

 and since a complete work of this character would undoubtedly be of 

 great service, we hope that in future Mr Gill will be even more 

 successful in drawing up his lists. We notice his statement that 

 Natural Science can be obtained post free for twelve shillings per 

 annum. This, as we remarked last year, is not the case. A 

 featvire that might be made very useful is the list of works on 

 natural science published during the previous year in the British 

 Isles. This is said to be complete, but we have failed to find 

 several works by well-known British authors which were reviewed 

 in our own pages last year. There is also a list of Societies, Field- 

 Clubs, Museums, etc., but this, like the other section, seems to us 

 very incomplete. In short, the " Naturalists' Directory " deserves 

 the support of our readers not for what it is, but for what it 

 might be. 



For Bibliographers 



Those who have used Dr H. Carrington Bolton's " Catalogue of 

 Scientific and Technical Periodicals " will be glad to hear that a 

 new edition is soon to be published by the Smithsonian Institu- 



