( Ixxvii ) 
Address, that such researches as these can never be satisfac- 
torily prosecuted, and still less brought to any interpretation 
of permanent scientific value, without the establishment in 
tropical countries of fitly equipped Biological Stations for the 
special observation and study, under as natural conditions as 
possible, of the surrounding terrestrial fauna. It is unneces- 
sary to dwell upon the manifest advantages attendant on 
well-directed work pursued steadily and continuously in such 
a zoological observatory, planted in the very midst of the 
abounding forms of tropical life, or to do more than mention 
the exceptionally favourable opportunities for discovery that 
would thus be afforded. In conclusion, therefore, I will simply 
express my firm conviction that from a few well organised 
stations of this kind, on carefully chosen sites in the four 
great tropical regions, Science would gain more in ten years 
than from the casual and incomplete observations of ordinary 
collectors and travellers for the next half century. 
