BRITISH LICHENS

PREFACE TO FIRST EDITION
THE long interval in time between the pUblication of Parts I.
and II. of the Monograph of British Lichens has been caused by
the continued ill-health and ultimate death of the Rev. James
Crombie, the author of Part I. Mr. Crombie had determined,
and partly arranged, a number of specimens, and had also begun
to prepare descriptions of the genera and species for Part II.,
when the work was finally interrupted by his death in 1906.
His collections, together with his MSS., were generously presented
to the Trustees of the British Museum by Mrs. Crombie, and I
was fortunately able to arrange with Miss Annie Lorrain Smith to
continue thc work. In the preparation of Part II. Miss Smith
has followed the form and arrangement adopted in Part 1., except
where dIVergence seemed absolutely necessary.
A. B. RENDLE.
DEPART3JENT OF BOTANY,
BRITISH MUSEUM (NATURAL HISTORY),
CROMWELL ROAD, LONDON, S.W.
February 1911.