LINKEAN SOCIETY OF LONDOX. I I 



occurriug, the masses remain colourless and the ultimate segmen- 

 tation units develop into flagellate Monads or, more rarely, into 

 equall}' minute Amoebae — myriads of one or of the other of these 

 forms appearing (all of about the same size) where a few hours 

 before they were absent. 



Later, from 5th to 10th day, the ultimate segmentation units of 

 other masses appear as aggregates of brown Fungus-germs. Often 

 the masses as a whole become brown before segmentation has 

 much advanced, and the different stages were shown by ^hich the 

 bacterial aggregates are completely converted into masses of brown 

 Fungus-germs, together with the development of hypha3 therefrom. 

 All the stages in the complete conversion of the Zooi/loea masses 

 into Monads or Amoebse in the one case, or into brown Fungus- 

 germs in the other, are clearl)" recognizable — though it is impossible 

 to say from the appearance of the masses in their early stages 

 which of these three interchangeable forms of life will ultimately 

 be produced. 



The Yice-President in the Chair having invited discussion, 

 Prof. Dendy enquired what means were employed to exclude the 

 entrance of foreign germs into the hay-infusion, to which the 

 Author replied. 



The following papers were read and discussed : — 



1. " The Structure of Isis liipjniris (Linnaeus)." By J. J. 

 Simpson. (Communicated by the President.) 



2. " Note on the Distribution of the Genus Shortla, Torr. & 

 Gray." By B. Daydon Jackson, Gen. Sec. L.S. (See p. 52.) 



March 1st, 1906. 



Prof. W. A. Heedman, F.R.S., President, in the Chair. 



The Minutes of the General Meeting of the 15th Februar}- were 

 read and confirmed. 



Miss Catherine Alice Eaisin, D.Sc. (Loud.), was proposed as a 

 Fellow. 



The vacancies in the List of the Foreign Members caused by 

 the deaths of Prof. A. S. Packard and Prof. R. A. v. Koelliker 

 having been declared, the following were proposed for election in 

 their place : — Oscar Hertwig, Professor of Comparative Anatomy, 

 Berlin University ; and Henry Fairfield Osborn, D.Sc, Da Costa 

 Professor of Zoology, Columbia University, New Tork. 



