SOS, 4i — 



PREFACE. 



Ik completing- another Volume, an opportunity presents itself 

 of congratulating^ the readers of the "Naturalist" upon the 

 flourishing position now attained by the journal. It can be safely 

 said that in no previous year has the " Naturalist" been so well 

 illustrated, both by plates and figures in the text, as during 1906 ; 

 and in no previous year have there been so many valuable 

 papers by such well-known authorities as those who have 

 favoured us with their contributions. 



On account of the quantity of valuable matter available, 

 the publishers ha\'e on four occasions increased the size of the 

 journal. On one of these a special " British Association " number 

 was issued, consisting of 64 pages, with photographs of some of 

 the Presidents, etc. This (the October) number may be safely 

 said to contain a reliable record of the natural history work 

 accomplished at the York meeting, and includes summaries 

 of the various papers read at the diff'erent sections, so far as they 

 relate to the northern counties. 



As in the past, prominence has been given to the work of the 

 Yorkshire Naturalists' Union, and reports on the scientific results 

 of its Excursions have appeared as promptly as was possible. 

 Particular care has also been taken to keep readers acquainted 

 with the current natural history literature, references to which 

 have appeared monthly in the "Notes and Comments," "Northern 

 News," or " Reviews " columns. 



Dr. Woodhead's absence abroad for most of the year has again 

 caused his colleague to be largely responsible for the volume. 



Mr. W. E. L. Wattam has kindly prepared the Index 



