AUTHOR’S PREFACE. 
The collection of Cretaceous Bryozoa in the British Museum 
has increased so largely during the past three years, that 
the preparation of the present Catalogue has been delayed. 
Collections of Bryozoa have been received from Biigen, 
Bohemia, Hannover, Touraine, and New Jersey, so that the 
Museum now possesses representatives of every important 
Cretaceous Bryozoan fauna. Unfortunately the North 
American collection was received too late to be included 
in this volume, and of the extensive series of specimens 
from Biigen only a small part has yet been identified and 
incorporated in the collection. 
For gifts of Cretaceous Bryozoa the Museum is indebted 
to Dr. H. P. Blackmore, Miss Busk, Prof. H. Credner, 
Mr. G. C. Crick, Mr. A. M. Davies, Mr. G. E. Dibley, 
Prof. Anton Fric, Mr. Wm. Gamble, Mr. Wm. Hill, 
Mr. A. H. Hinton, Dr. W. F. Hume, Prof. T. K. Jones, 
and Mr. Joseph Wright. 
It is hoped to include in the second volume the general 
introduction to the Cretaceous Bryozoa, a list of the localities 
with their horizons, and a bibliography. 
An effort is being made to include in the Catalogue 
every recorded Cretaceous species, so that the Index may 
serve as a complete record of the Cretaceous Bryozoa; but 
many species have been founded on inadequate descriptions 
or unrecognizable figures, and in such cases the suggestions 
as to the systematic position of the species are of doubtful 
value. In reference to horizons, it is deplorable that in 
the older collections and literature little attention was 
paid to the exact zones. 
