468 CHARACE^. IToh/pella. 



"Westmeath : Groves i8gj. — IX. Glencar Lake, Sligo ; and Glenade 

 Late, Leitrim : B.Sj-V. 1885. 



2. T. prolifera Leonh. 



Distriota — — — — V. — — — — — — — 



Lat. 53^°- Dublin only. Canals ; very rare. Frt. June-Jtily. 



V. Eoyal Canal near Griasnevin, Co. Dublin (Moore) : Ghrovea 

 zSSo. 



This rare species bas only been found in a few scattered locali- 

 ties in Central and Southern Europe, and iu North and South 

 America; in Great Britain it is apparently confined to a few 

 counties in the east of England. It has not been recently gathered 

 in Ireland. 



First found in Ireland by David Moore before 1860. 



3. T. intrieata Leonh. 



Districts — — — — V. — — — — — — — 



Lat. 53^°. Dublin only. Canals ; very rare. Frt. April-May. 



Y. Eoyal Canal near Glasnevin, Co. Dublin, before 1860 

 {Moore) : Groves 1880— &\iR there in 1896 ; F. W. Moore and D. 



Like the preceding species, this is apparently confined in Great 

 Britain to the eastern parts of England. 



First found by David Moore previous to 1860. 



NITELLA Agai-dh. 



1. N. Nordstedtiana H. & J. Groves. 



Districts I. — — — — . — 



Lat. 52°. Kerry only. Lakes ; very rai-e. Frt. July-August. 



I. South end of Caragh Lake ; neai- the Muckross shore of the 

 Lower Lake, Killarney : R. W. S. iSgo ^ -gi (as W. gracilis Agai-dh). 

 Near Swallow Island, KiUamey, 1892 (H. JF. S.) : Groves i8gs. 



A very minute plant, rarely much exceeding an inch in height. 

 While widespread in Eui-ope, and occurring in North America and 

 Australia, in Great Britain it has, so fai-, been found only in the 

 Outer Hebrides. Occurs in some abundance in the Eillamey 

 stations. 



First found in Ireland, at Caragh Lake, by E. "W. S. in 1889. 



