Proceedings of the Linnean Society of London - University Library

LINKEAN SOCIETY OF LONDOX. I I
occurriug, the masses remain colourless and the ultimate segmentation
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 Fungusgerms
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.
—