240 The Hydrachnid Fauna of Scotland. [Sess. 



in Scotland. Further systematic work will doubtless add 

 to the list in the future. One of the specimens of Fiona 

 conglobata was found to have an abnormal development of 

 one of the limbs. About half way down, the limb bifur- 

 cated, but unfortunately the specimen, when found, had 

 been somewhat mutilated by the other inhabitants of the 

 pond, although sufficient evidence remained to show that it 

 was a freak. 



In a communication made to this Society on 28th April 

 1897, Dr Thos. Scott and Mr John Lindsay report Diplodon- 

 tus as fairly common in the Upper Elf Loch. Curiously 

 enough, I have never taken specimens of this genus in my 

 collecting anywhere, although it has been reported also by 

 Mr Soar as occurring in Scotland. I may here observe that, 

 owing to changes in nomenclature, the water-mite recorded by 

 Messrs Scott and Lindsay, 23rd March 1898, as Arrenurus 

 buccinator is now known as Arrhenurus caudatus Be Gcer. 



HYDBACHNIDJS. 

 Sub-Family HYDRYPHANTINE^. 



Genus I., THYAS C. L. Koch. 



1* Thyas venusta C. L. Koch. 

 2* ti extendens Soar. 



Genus II., HYDBYPHAJSTTES C. L. Koch. 



3* Hydryphantes prolongatus Karl Thon. 



Sub-Family HYGROBATINE^. 

 Genus III., AERHE'N'URUS Ant. Duges. 



4 Arrhenurus maculator Midler. 



5 II zacharise Koenihe. 

 6* II neumani Piersig. 



7 II crassicaudatus Kramer. 



8* II caudatus De Geer. 



Genus IV., BRACHYPODA Lebert. 



9 Brachypoda versicolor Miiller. 



