98 MR W. E. HOYLE ON 
take for my illustration the elaborate Bibliography of 
Zoology published by the Concilium Bibliographicum at. 
Ziirich under the direction of Dr H. Haviland Field. 
The scheme which Dr Field has been gradually elaborating 
during the past ten years is nothing less than a complete 
card catalogue of zoological literature, beginning with the 
year 1896. It is intended to include not only books inde- 
pendently published, but also the thousand and one memoirs, 
papers, and notes which are published in journals and in the 
transactions of learned societies, irrespective of language and 
place of publication. It is calculated that upwards of 8000 
titles of zoological works are to be dealt with every year, and 
these are distributed over about 1500* different publications. 
Besides the zoological bibliography described here, the “ Con- 
cilium” publishes two other complete bibliographies upon the 
same scheme—the anatomical on cards only, and the physio- 
logical, which appears in card as well as in pamphlet form. 
The magnitude of this task is appalling, but Dr Field does 
not despair of accomplishing it by means of thorough and 
careful organisation. 
The cards are 12°5 x 7°5 cm., which is the standard size 
of the Library Bureau and several other agencies. A single 
title is printed on each card, giving on the top line at the 
left the name of the author, and at the right a classification 
number; then immediately below, the year of publication, 
title of the work, name of the journal or other place where 
it is to be found, number of pages, plates, and other 
illustrations; whilst at the foot of the card is the signature” 
and, in the case of cards on paleontology and zoology, 
the two first’ figures of the class number, as will be 
explained below. Further, if the title does not sufficiently 
indicate the nature of the contents, a brief explanatory 
note is added (see Example 2); new generic names pro- 
posed are given, and if new species are described the fact 
is stated, as also the genera to which they belong (see 
Example 3). 
* The actual number of periodicals {from which the cards issued from 1896 
to 1900 were taken was 1576. 
i i, 
