PART 1

PART 2
THE 10¢ TOUR OF THE PYRENOLICHENS
A TWENTY-YEAR PERSPECTIVE
In 1975 I submitted my thesis which, while dealing primarily with Arthopyrenia s. lat., also included a
primitive attempt to break away from Zahlbruckner's system, then in use. Over the ensuing 20 years my
mistakes as regards Arthopyrenia and the more general system have become evident, new ideas and
information have become available, critical specimens have been examined and a large number of new
records have accumulated. This anniversary seems an appropriate time to try again. The system proposed is
not intended in any way to be final but only an interim report. As noted in the introduction the title "tour" is
given to this part so that I am free to pick and choose what is treated. This is not the proverbial 50¢ tour, only
the 10¢ version, since I badly miscalculated the amount of errors, changes and specimens to be waded
through. The most interesting part, the higher categories, is left undone. They naturally fall at the end of such
a project since I have worked from the bottom (species) upwards. I do not like the current tendency to assign
new genera, etc., to "incertae sedis". This conveys absolutely no information. It is useless. It is an admission
of failure, of lack of general knowledge, of laziness, which one is surely forced to admit to on occasion but
should not become a way of life. Given a choice, I have chosen to err on the side of controversy. This, I
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