18 
REVIEWS. 
its able compiler may, with great propriety, plead the almost infant state 
of our knowledge of the Cheilostomota , and the abundant and accurate 
lists of synonyms which he has in every case appended; the other is the 
price at which they are published. This we would not, perhaps, dispute 
if they appeared as publications emanating either from the pen of Mr. 
Busk or any other similar source; but when they are ushered into 
existence with the pompous announcement that they are printed by order 
of the Trustees of the British Museum , we would have hoped that the 
price of the Catalogue might be such, that, when completed, even the 
poorest student could have been in possession of it as a welcome addition 
to his previously scanty store. 
We, however, will look with impatience for the future parts, and hope 
that these two, comprehending so many puzzling genera, will be succeeded 
by others in which the same care and accuracy of description will be main¬ 
tained, and that their talented author will be spared to see them valued, as, 
sooner or later, they must be by all who are capable of duly appreciating 
the laborious research which every page bears evidence of. 
We also regret, that in the conclusion of Part II. a Concordance of 
Synonyms, similar to that appended to other lists published by the British 
Museum, was not attached. We hope, however, to find it with the last 
part, as we can speak from experience of the great facilities it affords the 
student, who, perhaps, is only acquainted with the nomenclature of some 
British Monograph; and this is the more necessary, as in some genera of 
the Cheilostomota the specific distinctions are often so trivial as even to 
puzzle a practised observer to recognise them with certainty. 
Of the illustrations of every species catalogued we cannot speak too 
highly ; they far surpass anything of the kind we have yet seen for rigid 
accuracy and fidelity of execution, and will be prized by all whose good 
fortune it may be to possess so valuable and welcome an aid as “ Busk s s 
Catalogue of British Marine Polyzoa.” 
A Monograph of the sub-class Cirripedia. With figures of all the , 
species. By Charles Darwin, F.R.S., F.G.S. Volume I. 8vo. The j 
Lepadidae. London : Printed for the Ray Society. 1853. With 10 
Plates. Volume II. 8vo. The Balanidac, The Verrucidae, &c., &c. 
London : Printed for the Ray Society. 1854. With 30 Plates. 
Until comparatively recent years, the Lepadidaa and Balanidae—commonly 
known by the names of 11 barnacle,” and u acorn shells”—were supposed to \ 
