PREFACE. 



TT is the object of this Guide to afford help to those 

 *- students of Natural History who desire to make obser- 

 vations in the Cambridgeshire district. 



It is our pleasant duty to acknowledge the assistance we 

 have received from many willing helpers in preparing the 

 Guide. 



In the first place we wish to tender thanks to the 

 various authorities on the different subjects who have without 

 remuneration written the articles included in the book. 



To the Editors and Publishers of the Victoria History of 

 the Counties of England we owe our thanks for the article on 

 the Vertebrate Palaeontology of the County which was written 

 by Mr R. Lydekker for the County History of Cambridge, 

 and is here allowed to appear in advance. We are also 

 indebted to them for the use of other materials acknow- 

 ledged in the body of the work. 



The Geological Map of the County was kindly made by 

 Mr H. H. Thomas, M.A., of H.M. Geological Survey. Our 

 thanks are due to him and also to the Controller of H.M. 

 Stationery Office, who has permitted us the use of the 

 topographical details inserted on the map of H.M. Ordnance 



