132 The hish Nafnra/h/. June, 
Valvata cristata, Miill. — Very common in shallow drains near the police 
station at Bellarena (Welch, 1904). NNN. 
Acicula lineata, Drap. — -Below the cliffs of Benevenagh, at 900 feet alt. ; 
by the waterfall at Lignapaeste, in the Glens of Banagher ; in damp 
moss in Benady Glen, Dungiven ; and in the woods near Umbra. 
NNN. 
Sphaerium corneum, L.— In ponds on the Magilligan flat (Milne, 1894). 
I^NN. 
Pisidium pulchellum, ^ 
Jenyns. | All five species have been identified by 
P. casertanum, Poll. Mr. B. B. Woodward among specimens 
P. obtusale, Pfeiffer. [ collected by Mr. Milne in Walworth Wood. 
P. nitiduin, Jenyns. All are NNN. 
P. personatum, Malm. J 
Species of Pisidium have been taken by me in the following localities, 
but they have not been identified : — In the lakelet above Tamlaght Old 
Church, with Planorhis contortus ; in the marsh below Dungiven Abbey, 
with P. leucostoma ; in the marsh at Tamniarin Bridge, near Dungiven, 
with Limnaea palustris ; and in a wet field on Keady Mountain, with 
Limnaea trimcatula. 
Erroneous Records for the District. 
Ovatella bidentata, Mont. — Owing to a mistake this species has been 
recorded by me from Derry in the Irish List. This was because I 
thought that Mr. Milne had taken the species on the shore of Lough 
Foyle. Mr. Milne, however, telfs me that he never saw it in Derry. 
Paludestrina ventrosa, Mont. — Supposed specimens of this shell were 
taken some years ago by Mr. Welch in a brackish marsh near Lima- 
vady Junction. They are now regarded by Mr. Welch as abnormal 
specimens of P. stagnalis. 
I think that there are but two species absent from the 
above hst that I need comment upon ; these are Zonitoides 
nitidus and Vertigo antivertigo. It is almost impossible 
to believe that they do not occur in the marshes of the Roe 
Estuary, and yet neither Mr. Milne, Mr. Welch nor myself 
have seen them there. Moreover, their shells were not 
found by Mr. Welch in the debris which he collected here 
after the disastrous floods of 1903. We can only imagine, 
therefore, that for some peculiar reason they are exception- 
ally rare in this district. 
In conclusion, I have to record my thanks to Messrs. J. 
N. Milne and R. J. Welch for the help which they have 
given me in the preparation of these notes. 
Belfast. 
