14 



including an account of the structure and significance of tlie 

 so-called " septal glands," which had been found to contain two 

 defi.nite anatomical components. An appendix to this paper con- 

 tained an account of some Astomatous ciliate Protozoa, which the 

 author had discovered living conimensally in the gut of the 

 woi^m which formed the basis of his paper. One of these ciliates, 

 the largest and commonest, had been identified as Mesnilella 

 fastigiata, but no description had been found of three others 

 discovered along with it, which would probably prove to be new 

 species. 



Dr. "W. YoRKE, of the Liverpool School of Tropical Medicine, 

 read a paper, communicated by Mr. Guy Ohetwynd, F.Z.S., on 

 *' The Relationship of the Big Game of Africa to the Spread of 

 Sleeping Sickness." The author stated that sleeping sickness in 

 iSTyasaland and Rhodesia is due to a different parasite from that 

 causing the disease in other parts of Tropical Africa. In these 

 countries the disease is transmitted by Glossina morsitans and 

 not by Glossina 2}(^dpalis. As Glossina morsitans is ubiquitous, 

 and not limited in its distribution to water- courses, this fact has 

 an important bearing on the measures that can be recommended 

 with a view to prophylaxis. 



The chief reservoir of the virus is the big game, the tsetse-fly 

 transmitting the trypan osome from the big game to man and 

 domestic stock. 



In the consideration of prophylactic measures, the impossibility 

 of exterminating Glossina morsitayis was mentioned, and the 

 removal of population from fly-areas was equally impracticable. 

 The advisability of attempting to destroy the game in the 

 inhabited portions of fly-areas was then discussed, and the 

 necessity of a thoroughly scientific experiment being undertaken, 

 so that definite information of the results of exterminating the 

 game in a particular disti'ict may be forthcoming, was 

 recommended. 



In the discussion which followed several members and visitoi-s 

 took part, including Prof. E. A. Minchin, F.R.S., Sir Alfred 

 Sharpe, Mr. E. E. Austen, Mr. F. C. Selous, Mr. Guy Marshall, 

 Sir John Bland Sutton, and Dr. S. F. Hai-mer, F.R.S. , and letters 

 were read from the Hon. L. Walter Rothschild, D.Sc, F.R.S., 

 and Sir Henry Seton-Karr, C.M.G. 



The general opinion of the Meeting was not in favour of 

 Dr. Yorke's view^. 



