New Check List of British Agarics and Boleti. 1-4.

London, Cambridge University Press, 1960. 8vo. 225,+ (3, blanks),+ 159-468 pp. Elegant brown half morocco, sparingly gilt spine with raised bands, red sprinkled edges (Levins bokbinderi), front wrapper to part 1-2 preserved. From the library of Nils Fries, with his bookplate. Parts 1-2 were published as a Supplement to ?Transactions of The British Mycological Society 43, June 1960? whereas part 3. ?Notes on genera and species in the list. (with 514 text figures)? by P. D. Orton and part 4 ?Validations, New Species and Critical Notes? by F. B. Hora, were published in the volume itself. The old checklist (?Revised list of British agarics and boleti.?) was published in 1948 by R. W. G. Dennis and A. A. Pearson. P. D. Orton?s article here, where ?300 new species were described or new records to Britain offered? has been called his Magnum Opus.