, PROCEEDINGS OF THE SOCIETY. 225 



A very hearty vote of thanks to Mr. dirties and Mr. Waddington 

 was carried with acclamation by all present, and Dr. Scales then read 

 a communication by Lient.-Colonel O'Hara, entitled, "A Note on a 

 Microscopic Worm found in the Poison Gland of a Krait." 



The unanimous thanks of the Society were heartily accorded to 

 Colonel O'Hara for his communication. 



The President announced that the paper l)y Dr. Gemmill on 

 '* Convection-Current Circulation in Lal>oratory Aquaria ; an Aid to 

 the Rearing of Pelagic Larvae," would l)e taken as read, and would 

 appear in due course in the Proceedings. 



Dr. Shillington Scales read a letter from the Secretary of the 

 Lister Memorial Fund, acknowledging with thanks the Royal Micro- 

 scopical Society's contribution towards the Memorial. 



The President announced that the next Meeting of the Society 

 would take place on AYednesday, March 19. 



The next Meeting of the Biological Section would be held on 

 March 5, when Mr. E. J. Sheppard would make a communication on 

 " The Histology and Development of Teeth." 



The Brass and Glass Section would hold its Meeting on Wednesday, 

 February 26, 



The President announced that after a few words of introduction 

 from Mr. Scourfield, the Meeting would dissolve to view the exhibition 

 of Desmids brought together and demonstrated by Members of the 

 Biological Section. In connexion with the exhibit he should hke to 

 draw the attention of the Meeting to the fact that this was a somewhat 

 new departure suggested by their Secretaries and undertaken by Mr. 

 Scourfield, who had been well suppoited by the Members of the 

 Biological Section, all of whom had taken a great amount of trouble to 

 bring together the demonstration now before them. He hoped that 

 Mr. Scourfield would realize that the value of his work was recognized 

 by the Fellows of the Society, who were deeply indebted to him and to 

 those who had assisted him in this admirable demonstration. 



Mr. Scourfield explained that the actual demonstration on the use of 

 the Centrifuge in Pond-Life work would take place in the rear of the 

 Hall. For a long while after its introduction by Cori for the collection 

 of small aquatic organisms the centrifuge was used merely as a substitute 

 for a net, and it was not until Lohmann in 1908 published his paper on 

 the determination of the quantity of plankton in the sea that the 



