PREFACE. 
IX 
which were conceived necessary, are given in the form of Notes, at 
the end of the Table. The author would gladly have extended these 
Notes, for the purpose of pointing out the various names under which 
certain Fossils pass, and the changes which have taken place in the 
nomenclature of others; but he found them too numerous, and the 
subject at present too indetermined, to attempt it : he therefore 
abandoned the idea, and has noticed those only, the passing over of 
which in silence might have been deemed a defect. 
As this Work was undertaken solely with the intent of promoting 
Science, it is hoped that its imperfections will be viewed with can¬ 
dour ; and the author trusts, by his future attention to the subject, 
and the assistance of his friends, to be enabled to correct in a second 
edition, (should it be called for), whatever inaccuracies may have 
escaped his notice in the present. 
In conclusion, the author begs leave to return his thanks to those 
gentlemen who have kindly promoted his views in this Work ; par¬ 
ticularly to Roderick Impey Murchison, Esq. Secretary of the 
Geological Society, for valuable information and suggestions, and to 
express his regret that the M. S. did not come under his notice at an 
earlier period, (the Plan and Prospectus being then before the public) 
in order that he might have availed himself of them to the fullest 
extent. To the author of “leones Fossilium Sectiles” he is obliged, 
for communicating the unpublished Figures of British Fossils, li¬ 
thographed for the Second and Third Centuries of that Work, and is 
sorry that so useful and scientific a publication should, from unfore¬ 
seen causes, be at a stand. To the Rev. G. R. Leathes, of Shrop- 
ham Hall, Norfolk, he is under obligations, for the Localities of 
numerous Fossils of the Suffolk Crag; and to Gideon M ant ell, 
Esq. of Lewes, Sussex, for information respecting the Fossils of that 
county. 
Norwich , July 1st , 1830. 
