INTRODUCTION. Xlll 



1881, vol. xxxvii. p. 85, entitled, " On the Beds at Hoadon Hill and 

 Colwell Bay in the Isle of Wight." 



The different species of the Scalidae were determined by M. E. do 

 Boury during a visit to this country in 1889, and, as he is the best 

 authority on this group of shells, it is certain that the Museum has 

 benefitted considerably by the critical examination which he then under- 

 took. He has most kindly left his determinations in manuscript with 

 each of the species. 



Many works of reference have not been obtainable in the different 

 libraries of the Museum, and several times visits have had to be made to 

 the Iteading-Room at Bloomsbury, where I have always received the best 

 attention from either Mr. Metivier or Mr. Anderson ; to the Science 

 Library at South Kensington, where Mr. Barrett has kindly assisted me ; 

 and to the Library of the Eoyal School of Mines, Jermyn Street, where 

 my father, Mr. T. W. Newton, has rendered me much help. Many useful 

 suggestions on the literature of the subject have also been tendered mo 

 by Mr. B. B. Woodward of the General Library. To all these gentlemen 

 I here record my indebtedness for having facilitated my work. 



E. BULLEN NEWTON. 



Geological Department, 

 British Museum (N. II.), 

 21st July, 1891. 



