1923. Pack-Beresford — Algal Discolouration of Lough 91 



Neagh and the River Bann. 



numerous and at distances of about half the diameter from 

 each other. The filaments in the conglomerated masses 

 appeared to me to be many inches long and running parallel 

 together ; the broken fragments dispersed through the lake 

 cross each other in all directions." Drummond : Ann. & 

 Mag. of Nat. Hist. (1838), I p. i. 



I need only add that on my return to the River Bann early 

 in July the river was nearly its normal colour, but on again 

 examining some of the water under a lens it was found still 

 to contain considerable numbers of the floating filaments 

 but in greatly reduced numbers. 



Fenagh House, Bagenalstown. 



THE PEARL-BORDERED FRITILLARY IN IRELAND. 



BY R. A. PHILLIPS, M.R.I. A. 



On a bright day in June last Mr. H. Fogerty and I, while 

 passing along a rocky roadway in the limestone cragland 

 at Clooncoose near Kilfenora, Co. Clare, noticed large 

 numbers of a pretty butterfly flitting about in the sunshine. 

 We captured one but were at the time unable to identify it. 

 The specimen was subsequently sent to Mr. A. W. Stelfox, 

 of the National Museum, Dublin, who reported that it was 

 the Pearl-bordered Fritillary [Argymiis Euphrosyne, L.) 

 a species not previously known to inhabit Ireland. 



In Great Britain this is one of the commonest of the 

 Fritillaries, being widely distributed throughout England, 

 most abundently in the south, and ranging to the north of 

 Scotland ; its discovery so far west in Ireland is, therefore, 

 interesting and its apparent absence from, or rarity in, 

 other parts of the country remarkable. 



The late Edwin Birchall in his list of the Lepidoptera of 

 Ireland (pubUshedin 1866) expressed a confident expectation 

 that this species would eventually be found in the country, 

 and its discovery nearly sixt}' years afterwards in Clare 



