IV 
PREFACE. 
Mr. B. B. Woodward has given most valuable aid in revising 
the list ; and Mr. Bather has kindly supplied most of the 
additional titles relating to Palaeontology. The Editor has also 
the pleasure of thanking the Librarians of the Boyal, of the 
Linnean, and of the Zoological Societies, as well as the Librarian 
of the Science and Education Library, for their assistance. 
D. SHARP. 
Cambridge, Sqn . 18 , 1895 . 
