Vlll PREFACE. 



The compilation of this Bibliography has brought me 

 into contact with the Librarians of several of our 

 London Scientific Societies and other Institutions, to 

 all of whom I desire to tender my thanks for their 

 kind help. I may especially mention the Librarians 

 of the Linnean Society and the Zoological Society, 

 and those of the General and Zoological Libraries of 

 the British Museum (Natural History) at South Ken- 

 sington. In these Libraries, and also in that of the 

 British Museum at Bloomsbury, nearly all my w r ork 

 has been done. 



That the Bibliography is by no means complete I 

 am fully aware. That it might be considerably ex- 

 tended is evident from the Addenda, the result (with 

 the exception of a few cross-references) of researches 

 carried on since the earlier section (A to L) was 

 printed. I have found it impossible to gain access to 

 many foreign books and memoirs quoted in biblio- 

 graphies as containing references to the Tunicata. 

 Only a few of these are included on the faith of the 

 authority cited. I hope, however, that this work may 

 prove to be of service not only to students of the 

 Tunicata, but to all who have to refer to the literature 

 relating to Marine Biology. 



JOHN HOPKINSON. 



WEETWOOD. WATFOKD, 



12th March, 1913. 



