THREE RARE SPECIES OF HYDRACARINA 59 



Balea perversa. In woods on the coast, Achtercairn to Port 



Erradale. 

 Clausilia bidentata. Common ; on walls in Kerrysdale, also on walls 



and amongst vegetation on the coast, Gairloch to Strath. 

 Cochlicopa lubrica. Scarce ; Kerrysdale and on slopes of coast ; also 



on coast, Achtercairn to Port Erradale. 

 chium minimum. Common in boggy ground in wood on way to 



Kerrysdale ; scarce in boggy ground at Strath. 

 Succinea putris. Common in wet places on coast near the Gairloch 



Hotel. 

 Succinea elegans. Common in the same station as last ; also on 



rushes, etc., in wet places on the coast near Strath and 



Achtercairn. 

 Limnceaperegra. Common in all little streams and ditches ; also in 



wet places in Kerry Wood ; also in wet places near Strath and 



Gairloch Hotel. 

 Limnaa truncatula. Scarce ; in boggy ground at Strath. 

 Unio margaritifer. Abundant in the Kerry river. 

 Pisidium fontinale. Abundant in small pools and ditches on road- 

 side near Cam Dearg. 

 Pisidium pusillum. Abundant with the last; also common in 



boggy ground on the Kerrysdale road and near Strath. 



THREE RARE SPECIES OF HYDRACARINA. 



By Wm. Williamson, F.R.S.E. 



Hydrarachna processifera, Koen. 



1904. Hydrachna processifera $, Koenike. Abh. Nat. Ver. 



Bremen, xviii. 39-42, figs. 42-44. 

 1908. H. processifera ? , Viets, ibid., xix. 45 8 "46i, figs- 5' 6 - 



Shortly after its capture, I received from Mr Frank Walhs a 

 Hydracarid taken by him at Muiravonside, West Lothian, 18th 

 June 19 10. This proved to be a male of Hydrarachna processifera, 

 Koen., whose recorded occurrence has hitherto been limited to 

 Germany. In its external characters two features stand out 



