6 JOURNAL OF CONCHOLOGV. 



NOTE ON LIMN.^A GLUTINOSA, Muller. 

 Ey c. ashford. 



In October, 1S71, I recorded in "Science Gossip" tlie cap- 

 ture of this species in the river Brusna, King's co. I have now to 

 report its occurrence in the Newry Canal near Knockbridge, co. 

 Down, where Mr. Balkwill and myself found it on the T3th of 

 September. In the Brusna it occurred pretty plentifully resting 

 upon the under side of the floating leaves of the Water Lily 

 (Nuphar lutea), and our first search in the Newry Canal was 

 directed to the same plant, but without success. This was possibly 

 owing to to the somewhat clumsy means at our disposal for 

 bringing the leaves to bank, for in my search in the Brusna, where 

 I had the advantage of a boat, I noticed that on more than one 

 occasion when a leaf was roughly handled, the animal would 

 disengage its hold and sink in the water. Ultimately we found 

 two specimens adhering to the stems of Buckbean (Menyanthes 

 trifoliata) which is not an uncommon plant on the banks. 



Its associates in this new locality were PJiysa fontinalis, 

 Planoi-his albus, BitJiiiiia fenfacu/a/a, Le/nncea _peregra, L. stagnalis 

 L, auricularia and the young of Cydas cornea. 



L. glutinoia does not occur in the list in Thompson's 'Natural 

 History of Ireland,' though the author remarks (vol. iv. p. 303) 

 upon a variety of Z. pej-egra of " extreme delicacy " which had 

 been found by himself in loughs Neagh and Erne and received by 

 him from several other localities in Ireland. This variety, however, 

 which he describes as having " an epidermis-like covering of a dull 

 greenish-yellow color,'' he no doubt rightly identified with the 

 Guhiaria lacusiris of I^each, the Z. feregra var. lacustris of 

 Jeffreys, and speaks of as " intermediate in form between the 

 typical Z. pereger and Z. g!iitinosi/s." There is no doubt tlierefore 

 that Z. glutinosa as a denizen of Ireland was unknown to Thomp- 

 son. And yet it seems strange that the species should have 



J.C, ii , Jan., 870, 



