1898-99. | A Correct Colour Code. 45 
bound-up volumes, In reply to this, I say, if not applicable 
to the volumes on the shelf, there need be no difficulty in 
applying the code to the shelves on which past accumulations 
have been placed—to label-plates or to the whole length of the 
shelf-edges. 
There is, I believe, in existence an appointed committee 
presently engaged in a most important piece of work—“ The 
Committee of the Royal Society upon International Biblio- 
graphy.” I do not know whether I record the title correctly, 
and with the scope of that committee I am not fully ac- 
quainted, but it seems to me this question of eye-index is one 
which should claim a portion of their consideration. 
And now let me show the application of my colours to the 
Realms and Regions; after which I propose to assign the 
fixed combinations of these colours to the Sub-regions of Dr 
and Mr W. L. Sclater, and to state the reasons for the beliefs 
that are within me :— 
1. Arctic Realm : : : colour White. 
2. Antarctic Realm ; : un Grey. 
3. Ethiopian Region . : : n Black. 
These three may be held as representative for 
Day, Dawn, Night. 
Light, Twilight, Darkness. 
Knowledge, Doubt, Ignorance. 
Civilisation, Transition, Savagery. 
—or other fancies or associations in the mind. My Mind- 
associations are zoo-geographical. Then— 
4, Palearctic . ‘ : : colour Red. 
5. Neotropical . : : : un Blue. 
6. Australasian q : ‘ n Yellow. 
7. Oriental d : 2 : 1» Green. 
8. Nearctic : = = : 1 Russet ov Brown, 
Malagasy, Lemurian 
ab Eee Raceeeple, 
Purple may be used either as Regional or grafted as a Sub- 
regional upon Ethiopian." 
1 At the time this paper was read at the Zoological Congress at Cambridge it 
was intended to exhibit these colours on papers, buckrams, cloths, art linens, and 
canvases for the purposes of bindings; and also to show rough specimens of 
index volumes for each Realm or Region—if not perfectly matched, yet 
sufficiently so for illustration. 
