126 



SOUTH AFRICAN BIOLOGICAL SOCIETY 



At the ordinary monthly meetings the following papers 

 were read and discussed: 



Sul)ject. 



The development of the res- 

 piratory system of termites. 

 Bilharzia aud related para- 

 sites. 



Exhibition of lantern slides 

 with remarks on j'oung ani- 

 mals in the zoo. 

 Exhibition of a new bean 

 disease. 



New Saturniidse from S. Rho- 

 desia. 



The growth and development 

 of a termite's antenna. 

 Exhibition of new and in- 

 teresting birds and mammals 

 collected in the Cape Pro- 

 vince. 



New fossil shells from the 

 Cretaceous deix>sit in South 

 Africa. 



A lecture on Mimicry. 

 A lecture on plant geography 

 in S. Africa. 



Notes and discussions on some 

 new Hepialid?e. 

 Plant geography in S. Africa. 



Some changes in the external 



sex characters of ostriches 



observed after removal of the 



reproductive organs. 



Tlie behaviour of bacteria to 



arsenic. 



A preliminary communication 



on the toxic effects produced 



by methylene blue In animals. 



In general, the meetings were well attended and some 

 particularly so. 



Scott Memorial Medal— In March, 1918, the first Scott 

 Medal was presented to Sir Arnold Theiler, K.C.M.G. 

 On this occasion, through the kindness of Dr. I. B. Pole- 

 Evans and Stafl', we were able to entertain the contribu- 

 tors to the fund resident in Pretoria, who are not mem- 

 bers of the Society, in the l)eantiful grounds surrounding 

 the offices of the Division of Botany. I have no doubt 

 that this social function did much to bring the Society 

 in touch with the Pretoria public. — {A. J. T. Janse.) 



Date of 

 Meeting. 

 1918. 

 21 February. 



21 March. 



21 March. 



IS April. 

 IS April. 



15 April. 

 18 April. 



18 April. 



16 May. 

 16 July. 



16 July. 



22 August. 

 22 August. 



19 September. 

 19 September. 



Author, 



C. Fuller. 



Dr. P. G. Cawston. 



A. K. Haagner. 



Dr. E. M. Doidge. 

 A. J. T. Janse. 

 C. Fuller. 

 A. Roberts. 



Dr. E. C. van 



Hoepen. 



Dr. H. G. Breyer. 

 Dr. I. B. Pole- 

 Evans. 

 A. J, T. Janse. 



Dr. I. B. Pole- 

 Evans. 

 Sir Arnold Theiler 



and 

 D. Kehoe. 



Dr. H. H. Green. 



G. de Yilliers 

 de Kock. 



