Proceedings at the Meetings. 598 



February 2\st, 1910. 



In the Comparative Anatomy Lecture Room. 



Professor Seward, Yice-President, in the Chair. 



The following were elected Fellows of the Society : 



A. B. Bruce, M.A., Peterhouse. 



F. W. Dobbs, M.A., Trinity College. 



The following were elected Associates : 



R. T. Beatty, Emmanuel College. 

 W. T. David, Trinity College. 

 S. G. Lusby, Emmanuel College. 



The following Communications were made : 



1. Mimicry in Ceylon Rhopalocera, with some notes on the 

 enemies of Butterflies. (Illustrated by lantern slides.) By Professor 

 Punnett. 



2. The Andaman Islands. (Illustrated by lantern slides.) By 

 A. R. Brown, M.A., Trinity College. (Communicated by Mr A. E. 

 Shipley.) 



3. The Procession and Pupation of the larva of Cnethocampa 

 pinivora. By T. C Edwards, B.A., Emmanuel College. (Communi- 

 cated by Mr H. H. Brindley.) 



4. On Double Sixes. By Professor W. Burnside. 



5. The solution of a system of Differential Equations occurring 

 in the theory of radio-active transformations. By H. Bateman, M.A., 

 Trinity College. 



6. On the Change of Order of Integration in an improper repeated 

 Integral. By Dr Young. 



7. The production of cathode particles by homogeneous Rbntgen 

 Radiations. By R. T. Beatty. (Communicated by Professor Sir J. J. 

 Thomson.) 



8. On the scattering of rapidly moving electrified particles by 

 matter and its application to determine the number of corpuscles in 

 the atoms of the chemical elements. By Professor Sir J. J. Thomson. 



