368 Proceedings of the Koyal Society of Edinburgh. [Sess. 
extraordinary Scotia collections need more be said than that, in the three 
volumes of the Scientific Rej^orts which deal with invertebrates, the 
colossal total of some 1100 species is recorded, of which 212 are made 
known to science for the first time ? 
To the advance of our knowledge of some of the general problems of 
zoology Bruce’s investigations contributed not a little. His unique experi- 
ence of both Arctic and Antarctic seas and their inhabitants aroused again 
prolonged discussion of the bi-polar theory of the distribution of marine 
life, the chief result of which was to place a new emphasis upon the 
similarity of habit and of structural adaptation induced by similar 
conditions of environment and livelihood. 
Till recently the Arctic and Antarctic collections made by Dr Bruce 
were housed in the Scottish Oceanographical Laboratory at Surgeon’s 
Hall, and the arrangements he adopted showed how far his interest 
extended beyond the identification of specimens. Nothing could have 
been more instructive than the cases in which, layer above layer, he 
showed the characteristic inhabitants of different depths in the sea ; 
or those where the marine faunas of the islands he visited were placed 
side by side in comparative series. Some months before his death he 
presented these great collections, as well as his meteorological and physical 
apparatus, to the Royal Scottish Museum, and there a series of speci- 
mens representative of his most striking discoveries has been arranged 
for exhibition. 
I cannot close these remarks on Dr Bruce’s services to zoology without 
adding that no earnest student was turned away empty from his vast 
stores of knowledge. Close contact with him and his work for many 
years impressed me more and more with his striking personality, with 
his lovableness, generosity, and enthusiasm, which throughout sacrificed 
self for science. 
J. R. 
{Issued se'parately November 14 , 1922 .) 
