FRESHWATER RHIZOPODA FROM THE HEBRIDES, ETC. 59 



FRESHWATER RHIZOPODA FROM THE 

 HEBRIDES, ORKNEY AND SHETLAND 

 ISLANDS, AND WESTERN SCOTLAND; WITH 

 DESCRIPTION OF A NEW SPECIES. 



By G. H. Wailes, F.L.S. 



In 19 10 I received from H. B. Powell a gathering of 

 sphagnum from a grouse moor near Dumfries ; this and a 

 second gathering in 191 1 constituted the only material from 

 which the Dumfries list of Rhizopoda is compiled, hence the 

 absence of many common pond and lake species. 



In the same year W. West, F.L.S. , kindly sent me a large 

 number of tubes containing material he had collected, when 

 investigating the algal flora of Scotland, from the following 

 localities : — 



Orkney Islands} — Southern part of Pomona and the 

 northern part of Hoy, and plankton from Loch Kirbister. 



Shetland Islands. — Bressay and Mainland, and plankton 

 from seven lochs. 



Hebrides. — Lewis, Harris, North Uist, and Benbecula. 



Sutherland. — Loch Shin and a mixed gathering from the 

 Scourie district. 



Skye. — One gathering. 



John 0' Groats. — One tube in which no Rhizopoda were 

 found. 



In contrast to the Dumfries material these gatherings were 

 mostly from pools, lakes, etc., and consequently many sphag- 

 num-inhabiting species, which no doubt occur, were not found. 



Owing to the material having been preserved it was not 

 possible to identify any of the Amcebina (the sphagnum from 

 Dumfries did not contain any); of the order Conchulina, 102 

 species and varieties were found. G. S. West in Ann. Scot. 

 Nat. Hist., 1905, gives lists of Rhizopoda from the above 

 islands, where all the species he enumerates were found ; 

 Nebela triangulata, var. bicomis (G. S. West), found by him 

 in Loch Shiel, was not seen by me in any of the plankton 



1 A detailed account of the gatherings will be found in " Freshwater 

 Algas from the Orkneys and Shetlands," by W. and G. S. West, Trans. 

 Bot. Soc. Edin. x 1905. 



