X 
PREFACE. 
Thanks are also due, for similar assistance, to Mr. S. S. 
Ihickman, Mr. 11. W. Burrows, Mr. C. 1,). Sherborn, and 
Mr. B. B. Woodward. Bor permission to use copyright 
illustrations the ITustees are indebted to Messrs. A. & C. 
Black, Messrs. Archibald . Con .stable & Co., Messrs. Long- 
mans & Co., the (Jambridge Unh'ersity Press, the Council of 
the Geological Society, and I)r. Henry Woodward, F.B.S. 
(Kditf)r of the Geological Magazine). 
A. SMITH WOODWARD, 
Keeper of Geology. 
DhPARTMKN'I’ of GK0L0C4Y. 
Oct. 19] 1. 
