IV 
Amidst the work of the oiaer observers , the original labours of 
William Smith, which must always hold the foremost place, are 
commemorated in the names given by him to many of the chief 
sub-divisions of the Oolites. He was followed by Conybeare, 
Buckland, Lonsdale, John Phillips, and Murchison. The 
writings of these geologists on the Oolites were largely strati- 
graphical. To a succeeding generation we owe the determination 
of the chief palseontological horizons, and among those no longer 
living we are indebted mainly to James Buckman, Thomas 
Wright, John Lycett, John Morris, Samuel Sharp, and Edwin 
Witchell. Among living geologists who have largely added to 
our knowledge of the Jurassic rocks, the names of Mr. W. H. 
Hudleston and of Mr. S. S. Buckman, who have done so much in 
the Inferior Oolite, should be specially mentioned. 
In the field Mr. Woodward has received much friendly personal 
assistance from the Rev. H, H. Winwood of Bath, Mr. S. S. 
Buckman of Stonehouse, Mr. W. 0. Lucy of Gloucester, Mr. E. 
Wethered of Cheltenham, Prof. Allen Harker of Cirencester, 
Mr. T. J. Slatter of Evesham, Mr. E. A. Walford of Banbury, 
and Mr. Beeby Thompson of Northampton. From their 
published papers great help has likewise been derived, as will be 
seen from the references to these throughout the volume. 
The fossils collected by the author, excepting only such forms 
as could be safely identified in the field, have been named by 
Messrs. Sharman and Newton ; who now perform the duties 
which were formerly discharged so well by Mr. Etheridge for 
the earlier Jurassic Memoirs. 
Mr. Teall has examined and reported upon a large number of 
microscopic sections of Oolitic rocks, and we are under obligations 
to Mr. J. H. Player for some analyses of Fuller's Earth. 
For some of the illustrations in this volume, as will be seen 
from the list in the Table of Contents, we have to acknowledge 
the courtesy of the Council of the Geological Society in per- 
mitting the use of blocks from the Quarterly Journal of the 
Society, and of Dr. Henry Woodward in supplying others from 
the Official Guides to the Department of Geology in the British 
Museum. A few cliches appear from my text book of 
ideology, and some of the cuts are reproduced from former Survey 
Memoirs. But most of the figures of fossils have been engraved for 
this work, the sources from which the drawings were made being 
acknowledged in the List of Illustrations. 
ARCH. GEIKIE, 
Director-General . 
Geological Survey Office, 
28, Jermyn Street, London, 
17th January 1894. 
