PREFACE.

Having so lately, in my volumes on the Recent and Fossil Lepadidæ,

expressed as strongly as I could, and with the utmost sincerity, the

obligations under which I lie to very many naturalists, I will not

here repeat my thanks, and will only say that the assistance formerly

rendered me from so many quarters has been most kindly continued

without intermission. The references under the Habitats, in which I

may remark the names of Mr. Cuming and of Mr. Stutchbury, and of the

British Museum, so often recur, show my deep obligations to these

gentlemen and to Dr. Gray, and indeed to most of the British and

several Foreign[1] collectors of recent and fossil shells. At the

period when the Introduction to this volume was printed, I stated that

I did not know whether the Palæontographical Society would publish

the few British fossil Balanidæ; the Council has now honoured me by

determining on this publication, so that these species will hereafter

be more fully illustrated than they could be in the present volume. I

cannot conclude this short preface, without again tendering my most

grateful thanks to the Council of the Ray Society for the publication

of my two volumes, and for the very kind manner in which they have

acceded to all my requests.

DOWN, KENT; _July, 1854_.

[1] I feel under special obligation to Mr. Dana for several very

interesting communications connected with the present subject, and

for information derived from his magnificent work on the Crustacea,

collected during the United States Exploring Expedition. Also

to M. Bosquet, of Maestricht, for the loan and gift of several

interesting fossils, described and illustrated with the utmost

fidelity, in his beautiful "Monographie des Crustacés fossiles du

terrain Crétacé du D. de Limbourg."

A Monograph on the Sub-class Cirripedia (Volume 2 of 2) The Balanidæ, (or Sessile Cirripedes); the Verrucidæ, etc., etc. · 第 29 / 417 题