102 MR W. E. HOYLE ON 
Example 5 :— 
\ 
6 Vertebrata \ 
\ 
7 ~ Pisces 
76 Amphibia 
8  Sauropsida 
81 Reptilia 
82 Aves 
9 Mammalia 
As a further help there has been issued a descriptive 
pamphlet, containing explanatory paragraphs and a number 
of indexes. There is first a conspectus methodicus, which gives 
a bird’s-eye view of the whole scheme with the proper 
numbers affixed to each division. Then follows an alpha- 
betical index, in Latin, English, French, and German, in 
which are included the names of all parts of the body whose 
anatomy and physiology may be treated, geographical names 
and systematic divisions of the animal kingdom, besides 
general topics such as heredity, degeneration, evolution, and 
the like. 
As an instance of the utility of this catalogue we may 
quote a recent report of the Swiss Society of Naturalists. It 
endeavours to estimate in a specific case the saving of 
time afforded by the card catalogue in obtaining references 
to recent publications in regard to the trout. The saving is 
estimated at half a day. But in regard to other cases the 
saving is far greater. Let any zoologist familiar with past 
bibliographical resources consider how he would go to work 
to ascertain what has been published in the past five years 
in regard to some minute question, such as the fauna of 
Sumatra. A moment’s reflection will suffice to show that it 
would be a task of many weeks to obtain an answer to such 
a question. Yet a subscriber to the faunistic part of the 
bibliography of the Concilium would only require a few 
seconds to find 62 publications dealing with the question. 
The titles of ten of these publications would, it is true, bear 
no mention of Sumatra; they are classed here because on 
perusing the text important references to Sumatra were 
found. Some, indeed, bear titles that would seem to 
