PROGRESS IN PROTOZOOLOGY

PHYLOGENETIC RELATIONSHIPS AMONG PROTOZOA 203
sporoblast), in the fine structure of trophozoites, and in function of
cells within a Plasmodium.
Since the Discussant failed to supply me with a synopsis of his statement
and because there was virtually no discussion on the part of
the members of the Panel, nothing further can be reported on MYXO-
ZOA. More time ought to be devoted to this phylum during the next
Congress.
Phylum CILIOPHORA
Speaker Discussant
Dr. Dennis Lynn (Canada) Prof. J. O. Corliss (U.S.A.)
Many persons, i.e., Professors A. C. B o r r o r (U.S.A.), M. F. C an
e 11 a (Italy), J. Dragesco (Africa), A. W. Jankowski (U.S.S.R.),
and P. de Puytorac (France) were also invited to participate, in
the capacity of speakers or discussants, in considering this large and
throughly investigated protozoan group. Actually Dr. L y n n's presentation
was based to a large extent on the questions raised by Prof,
de Puytorac in his abstract printed in the Congress Proceedings.
We hoped for a lively exchange, indeed, for some controversy (there are
major disagreements among the experts to be found in their publications).
For various reasons, the aforementioned workers were unable
to join us in Warsaw. The organizers of the Congress and I, as chairman
of the Round Table Discussion, are particularly grateful to our young
colleague, Dr. Lynn, who with the aid of Prof. Corliss, the Dean
of the U.S. "ciliatolo,gists," made an excellent scholarly contribution
to our deliberations. (B.M.H.)
According to Dr. LYNN, progress has been made over the past
two decades in the systematics of ciliated protozoa. Succeeding the
earlier schemes (Corliss 1961, H o n i g b e r g et al. 1964), the more
recent schemes (de Puytorac et al. 1974, Corliss 1974, 1979,
L e v i n e et al. 1980) have incorporated, among other, new ideas on
the evolution of nuclear dualism (R a i k o v 1969), on the relationship
between blepharocorythid and entodiniomorphid ciliates (W o 1 s k a
1971), and on the similarities in buccal structures of various groups (de
Puytorac and Grain 1976).
Small and Lynn (1981) have suggested that the present systems
do not recognize monophyletic assemblages if ultrastructure of the cortex
is considered. Lynn (1981) has argued that the structural conservatism
of biological organization should allow us to place greater weight
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