SESSION 1905-1906. 



l.—A CONTRIBUTION TO THE HYDRACHNID 



FAUNA OF SCOTLAND. 



Br Mr WM. WILLIAMSON. 



{Read Nov. 22, 1905.) 



The only list of Scottish Hydrachnids that I know of is that 

 which was submitted to the Quekett Microscopical Club in 

 November 1900 by Mr Chas. D. Soar, F.RM.S., — now one of 

 the Corresponding Members of this Society. In that list 40 

 species, belonging to 20 genera, were enumerated as having 

 been found in the district near Oban by Mr Taverner. Since 

 that time I have been collecting Hydrachnids, chiefly in the 

 neighbourhood of Edinburgh, Glasgow, and West Kilbride, 

 Ayrshire, and a list of those collected is now put on record. 

 After being named by me, all the specimens were submitted 

 to Mr Soar and verified by him ; and it is due to him to 

 acknowledge the constant courtesy and kindness with which 

 he has helped me in this branch of zoological study. The 

 classification and nomenclature which I have followed are 

 those of Dr Piersig's ' Deutschlands Hydrachniden ' (Zoologica, 

 Heft 22, 1897-1900), supplemented by ' Hydrachnidse und 

 Halacaridse,' Piersig and Lohman (Das Tierreich for 1901). 

 Since these works were published numbers 2 and 18 in this 

 list were described by Mr Soar as new species. An asterisk 

 marks those species which do not appear in Mr Soar's list 

 of 1900. These number 14, so that now 54 species of 

 Hydrachnids are recorded by Mr Soar and myself as found 



VOL. V. Q 



