Pelagic Organisms in Scottish Lakes. 



61 



in the Table which follows. In this Table, in addition to the 

 truly pelagic species, whether Arctic or southern, I have 

 included a number of Cladocera, less pelagic, or confined to 

 shallow waters, in order to show that the same limits of 

 distribution affect a considerable number of species. From 

 the Table, it will appear that there are eight species common 

 in the north and quite absent from the south, five which 

 are common in the north and rare in the south, four which 

 are absent from the north and present in the south, and 

 two which are rare in the north and common in the south. 



DiSTEIBUTIOK OF SOME CRUSTACEA IN SCOTLAND, NORTH ENGLAND; 



AND South and East England. 



Literature Keferred to. 



1. Scott, T., Invertebrate Fauna of the Inland Waters of 



Scotland, Parts I. to IX. Annual Reioorts of the Fishery 

 Board for Scotland, 1890 to 1899. 



2. Scott, T., and Duthie, R., The Inland Waters of the 



Shetland Islands, Parts I. to IV. Annual Reports of the 

 Fishery Board for Scotland, 1895 to 1898. 



3. Scott, T., Freshwater Entomostraca of Aberdeenshire, Ann. 



Scot. Nat. Hist., 1899, p. 216; 1901, p. 157; 1902, p. 21. 



