366 THE PRESIDENTIAL ADDRESS. [ Sess. LXxI. 
species he was appointed one of the referees of the Concho- 
logical Society of Great Britain and Ireland for Marine 
Mollusca. In 1886 he published a “ List of British Brachio- 
poda and Marine Mollusca,” which was recognised as the 
standard by all students till the publication of the Concho- 
logical Society’s List in 1900. 
The work he did in the critical study of the vascular 
plants of the British Islands, and particularly the topo- 
graphical distribution of Scottish plants, is of more immediate 
interest to this Society. To this study he brought all the 
care and attention to structural detail which he devoted to 
the Mollusca, and he became a recognised authority in this 
department, and his opinion was highly valued and frequently 
sought by workers in the same field, to whom he was at all 
times most willing to give any help in his power. His 
topographical researches were chiefly carried on in the 
West of Scotland, but he visited many other districts where 
fuller information seemed to be desirable. He spent several 
weeks in Orkney investigating the flora there. He was for 
several years President of the Glasgow Natural History 
Society, three years President of the Conchological Society 
of Great Britain and Ireland, a strong supporter of the 
marine station at Millport, and keenly interested in the 
Scottish Antarctic Expedition. His enthusiasm was con- 
tagious; nothing delighted him more than to assist a fellow- 
worker, and acknowledgments of such help are frequent in 
scientific publications. The results of his work have been 
published in the “Transactions of the Glasgow Natural 
History Society,” the “ Annals of Scottish Natural History,” 
and the “Journal of the Conchological Society.” He became 
a Fellow of the Linnean Society in 1881, and a Fellow of 
the Botanical Society of Edinburgh in February 1886, and 
between 1896 and 1905 made some exceedingly interesting 
communications to our “ Proceedings.” These are :— 
LIST OF CONTRIBUTIONS TO THE BOTANICAL SOCIETY. 
Cystopteris montana in Stirlingshire. Transactions, vol. xx., 1896, 
. 285. 
me Te undulatum, Liun., a Cudweed, new to the London Cata- 
logue, from Jersey. Transactions, vol. xx., 1896, p. 345. 
Specimen of Goat Moth, Appendix xxxiv. Carex limosa and C, 
magelianica, Appendix xxxii. Presentation of Watsonian Vice- 
Counties, Appendix xxxii. Transactions, vol. xxi., 1900, 
