

PRESIDENT'S ADDRESS. Ixxxv. 



more of the results of his studies. The Rev. Richard Paget 

 Murray and Mr. Benjamin A. Hogg were both formerly Members 

 of the Club, and will be remembered by many amongst us. Mr. 

 Murray, the Vicar of Shapwick, near Blandford, was first in the 

 First-class in the Natural Science Tripos, 1867. He was an 

 excellent botanist, and contributed, amongst others, a paper on 

 that most puzzling group, the Rubi, or brambles, on which he was 

 an authority, to our " Proceedings " (Vol. XII.) He was also, like 

 myself, fond of entomology. Ill-health caused him to have to 

 spend much of his time at such places as Teneriffe, where he has 

 often described to me the delights and dangers of botanising. 

 Mr. Hogg was well known as a collector of antiquities, many of 

 his finds being now in the Dorset Museum. He used often to 

 attend our meetings. 



ZOOLOGY. 



In the year 1908 was celebrated by the Linnaean Society the 

 Darwin-Wallace Jubilee, it being 50 years since the joint papers 

 of Darwin and Wallace on the origin of species from natural 

 selection were read before the Royal Society, and formed a new 

 departure for scientific thought and theory in the realm of 

 natural history. Charles Darwin has passed away ; but Alfred 

 Russel Wallace was present and gave an account of the scene of 

 half a century ago. Beginning with the lowest forms of life, it is 

 possible that a new field for investigation may be opened out 

 through the discovery of a Trypanosome in the Malpighian 

 tubules of a common fly (Drosophila confusd). These minute 

 creatures, so destructive in sleeping sickness and many other 

 diseases, have hitherto never been found except in the blood of 

 a vertebrate animal or the digestive tract of a blood-sucking 

 invertebrate, such as a fly or tick. London may congratulate 

 itself on the fact that not a single typhoid bacillus has been 

 found, though more than 7,000 samples of water taken straight 

 from the Thames, Lee, and New River have been examined in 

 the course of twelve months. War has been successfully 

 waged in Cuba against the mosquito (Stegomyia], which conveys 



