vi Preface to the Bibliography 



of publication, the title of the paper and the Journal, etc. where the 

 paper was published. The Roman numerals after the name of the 

 Journal or book indicate the number of the volume, and the figures 

 printed in ordinary type refer to the page. In some cases a short 

 comment upon the contents of the publication accompanies the re- 

 ference ; comments not followed by initials are by G. H. F. N., others 

 are initialed by L. E. R. or W. F. C. Unless otherwise stated in the 

 text or reference the quotations are from the original papers. 



In a number of cases titles have been cited from short bibliographies 

 given by other authors, the original papers being either inaccessible or 

 not having been as yet consulted by us in the original. The bibliographies 

 referred to are by Hunter and Hooker, 1907, Salmon and Stiles, 1901, 

 and Stiles and HassaU's Index, 1902, which is still appearing (abbreviated 

 to H. and H. bibl., S. and S. bibl. and S. and H. bibl. in our bibliography) 

 Some references are taken from Neumann, Huber, and other sources, 

 including the Zoological Record and the Bibliographia Zoologica (Zool. 

 Anzeiger). L. E. Robinson and W. F. Cooper have checked a number 

 of the references. We are indebted to C. Warburton for kindly aiding 

 with the translation of some extracts from the writings of classical 

 authors. 



We shall be very grateful to readers who may draw our attention to 

 errors or omissions in the bibliography. 



G. H. F. N. 

 L.E. R. and W.F.C. 



Cambridge, 

 ./,//y, 1911. 



