PROCEEDINGS - PERTHSHIRE SOCIETY OF NATURAL SCIENCE. Ixi 
work, apart from our own Society, but as Prof. Traill is preparing 
a paper on this subject for the Annals of Scottish Natural History 
I shall content myself by giving a mere summary of his writings. 
This I do chiefly to show how untiring his industry was, and what 
an immense amount of scientific work and writing he accomplished,— 
work which was done in such a quiet and unobtrusive way that few 
of us were aware of its volume or its value at the time. The mere 
list of titles of his papers covers several sheets of folio paper. 
If we omit his early contributions to the Entomologisfs Weekly 
Intelligencer, to which reference has already been made, we find that 
the dates of his published papers extend from 1866 to 1892. 
During that period of twenty-seven years, in addition to his com¬ 
munications to our Society, he contributed, so far as I have been 
able to ascertain, some 203 papers and notes to various scientific 
journals and societies throughout the country, as well as on the 
Continent and in America. Of these, 115 were on zoological sub¬ 
jects, and 88 on botanical subjects. I have made out a list of these 
in chronological order, and it is interesting to trace from this list the 
sequence in which he took up the various branches of biological 
study to which he devoted more especial attention. Papers on 
Entomology and on Botany appear throughout the whole period, 
but, while the former constantly decreased, the latter constantly 
increased in number. His most important entomological writings 
were published during the decade from 1870 to 1880. Towards the 
close of 1879 occurred the death of Sir Thomas Moncreiffe, who 
had been his close companion in this pursuit, and after that he did 
not often carry a net during his excursions. During the latter half 
of the decade referred to he turned a good deal of attention to 
foreign insects, particularly those belonging to the order Hemiptera, 
and published memoirs on those occurring in New Zealand, in the 
Hawaian Islands, in St. Helena, in the Amazons, and in North 
Brazil and Nicaragua; and, most important of all, on the Pelagic 
species collected by the naturalists of the “Challenger” Expedition. 
In 1873 and 1874 he published, in the Scottish Naturalist, important 
papers on the Land and Freshwater Mollusca of Scotland, with notes 
on all the species then known to occur in this country. His papers 
on Fungi first began to appear in 1874, the year previous to the 
commencement of the Cryptogamic Society, and, during the suc¬ 
ceeding six years— i.e., until the end of 1880,—he wrote frequently 
on this subject. During the next twelve years, 1881 to 1892 inclu¬ 
sive, his attention was devoted almost exclusively to flowering plants, 
and it was within this period that he perfected his knowledge of the 
Flora of Perthshire, while, at the same time, he prepared the sheets 
of his work on that subject. While, however, he was studying the 
flowering plants generally, there was one group which was engaging 
his special attention, namely, the Willows. From 1886 onwards he 
contributed numerous papers on this subject to various journals, but 
the most important was one entitled “ A Revision of the British 
Willows,” which he read before the Linnsean Society of London in 
June, 1889, and which was published in the journal of that Society 
in the following year. His last published paper (so far as I am 
