Vlll 
author’s peeface. 
In the case of some important specimens, the only available 
information is, that they come from the Chalk of Kent or 
Sussex. The materials are not in existence for a full zonal 
study of the Cretaceous Bryozoa, which is impossible while 
the systematic arrangement of the group is so unsatisfactory. 
The effort has been made to improve the classification of 
the fauna, and thus to assist the subsequent zonal study, 
which is being rendered possible by such collections as 
those of Dr. A. W. Rowe. 
I have pleasure in expressing my thanks to Mr. R. 
Kirkpatrick for his ever ready assistance in referring 
to the recent Bryozoa in the Zoological Department ; to 
Mr. A. Smith Woodward for many editorial suggestions ; 
to Mr. C. D. Sherborn for opportunities of reference to 
his Index Animalium ; to Miss G. M. Woodward and Miss 
Drake for the care with which they have drawn the plates ; 
and to Mr. W. C. Newton, an Attendant in the Department, 
for the intelligence and care with which he has prepared 
the index. 
A list of the collections included in the Museum series 
of Cretaceous Bryozoa will be added in the second volume; 
but I cannot pass without reference the magnificent 
collection made by Mr. Wm. Gamble from the Chalk of 
Chatham. He presented a small series to the Museum in 
1889, and since then has continued his patient search 
which has enriched the Museum collection with its finest 
series of Cretaceous Bryozoa. 
J. W. GREGORY. 
Geological Department, 
British Museum (Natural History). 
October 24 , 1899 . 
