46 ' The Irish Naturalist, 



N. tenulssltna, Kuetz. 



130. Gal way, E., - - Near Ballindooley, 1892. H. and J. G. 

 I33. Westmeath, - - Scraw Bog near L. Owel, 1892. H. C. 



Levinge, and H. and J. G. 



This occurs in Europe, Asia, North Africa, and North America. 

 In Britain it has only been found in the widely separated counties of 

 Cambridgeshire and Anglesey. It occurs in peat-pits and dikes, but on 

 account of its dark colour and slender stem is often very inconspicuous. 

 As we found it in the only two sets of peat-pits which we had the 

 opportunity of examining during our short visit to Ireland, and as the 

 country abounds in similar habitats, we have no doubt it will be found 

 to be much more generally distributed. 



N. srracllls, Ag. 



123. Wicklow, - - L. Luggela and L. Dan, 1892. R. M. Bar- 



rington and H. and J. G. 

 125. Dublin, - - Near Ballybetagh, Glencullen, 1872. D. Orr. 



The Luggela plant is a remarkably fine form with very longbranchlets. 

 N. gracilis is found nearly throughout Europe, in Asia, Africa, and North 

 and South America. 



. N. translucens, Ag. 



113. Kerry, S., - - L. Caragh, 1876. A. G. More. 



114. Kerry, N,, - - Mannabone Mtns. D. M'Ardle. 

 135. Galway, W., - - Clifden, 1869. A. G. More. 



145. Armagh,- - - Cashel L., 1892. R, LI. Praeger. 



147. Down, - - - Derry L., 1887. R. LI. Praeger. 



148. Antrim, - - - Lissanorn Castle. D. Moore. 

 149 Londonderry, - - Kilrea, 1836. D. Moore. 



N. trattsluceiis occurs principally in Western Europe, but reaches to 

 Sweden in the north, and to Algiers, &c., in the south, and a variety or 

 sub-species is found in New Zealand. It grows usually in ponds, lakes, 

 and canals, but occasionally in running water. 



N. flexllls, Ag. 



113. Kerry, S., • - Caragh Lake and L. Acoose, 1889. R. W, 



Scully. 



115. Cork, S.,- - - Glengarriff. I.Carroll. 



J37. Mayo, E., - - Cong, 1885. E). F. and W. R. Linton. 



139. Leitrim, - - - L. Allen, 1883. S. A. Stewart. 



141. Fermanagh, - - Rossford Point, 1837. W. Thompson. 



148. Antrim, - - - Carnlough River, 1892. R. LI. Praeger. 



Probably a commoner plant than the above list would seem to indicate, 

 but many specimens we have seen which may belong to this species are 

 sterile and we have not been able to determine them, N. flexilis is widely 

 distributed in Europe, and has been recorded from Siberia and North 

 and South America, 



