Proceedings at the Meetings. 
617 
The following Communications were made : 
1. (1) Exhibition and description of a portion of a fossil jaw of one 
of the Equidae (British East Africa). (21 Exhibition of Zebra skins 
(13) and skulls (4) from British East Africa, with special reference to 
the problem of the centre of distribution of the three species of Zebras. 
By Professor Ridgeway, Gonville and Caius College. 
2. On a new genus of Ixodoidea, together with a description of 
eleven new species of Ticks. By Professor Nuttall, Christ’s College, 
and C. Warburton, M.A., Christ’s College. 
3. (1) Description of a microcephalous new-born Pig. (2) Report 
on the brain of a microcephalous idiot. By W. L. H. Duckworth, 
M.D., Sc.D., Jesus College. 
February 1( )th, 1908. 
In the Cavendish Laboratory. 
Mr S. Ruhemann, Vice-President, in the Chair. 
The following was elected a Fellow of the Society : 
C. Shearer, B.A., Trinity College. 
The following Communications were made : 
1. (1) On the nature of the y rays. (2) On the velocity of 
cathodic secondary radiation. By Professor Thomson. 
2. On the spectrum of the discharge from a glowing lime cathode 
in Mercury Vapour. By F. Horton, B.A., St John’s College. 
3. An example of complex double integration. By Dr A. C. Dixon. 
February 2±tlt, 1908. 
In the Botany School. 
Mr D. Sharp, Vice-President, in the Chair. 
The following Communications were made : 
1. (1) Relation between the Geographical distribution and the 
classification of the Onychophora. (2) On the method of impregnation 
in Eeripatus. By Professor Sedgwick. 
2. Exhibition and description of Welwitschia collected by Professor 
Pearson. By Professor Seward. 
