SllCES : NON-MARINE jMOLLUSCA OF KRIESLANti. ^1 



Acroloxus lacustris (L).— 



var. compressa Jeffreys. — Heerenveen. 

 Vivipara contecta (Millet). — Passim. 

 Bithynia tentacuiata (L.).— Passim. 



var. producta Menke. — Heerenveen, Heeg, and Sloten. 



m. decollatum. — Sloten. 

 Bithynia leachi (Shepp.).— Sloten. 

 Valvata piscinalis (Miill.). — Heerenveen and Sneek. 

 Unio tumidus Retz. — Passim. 



var. acuta Pascal. — Uilst. 

 Unio pictorum (L.).— Heeg. 

 Anodonta cygnaea (L.).— Passim. 

 Anodonta anatina (L.). — Sneek and Heeg. 



var. piscinalis Nilsson. — Heeg. 

 Sphaerium corneum (L.). — Passim. 



var. nucleus Studer. — Heerenveen. 

 Sphaerium rivicola (Leach). — Heerenveen, young specimens. 

 Sphaerium lacustre (iMiill.). — Heerenveen. 



var. rotunda Jeff. — Heerenveen. 

 Pisidium fontinale Drap. — Heeg. 

 Pisidium henslowanum (Shepp.). — Heeg. 

 Pisidium gassiesianum Dupuy. — Heeg. 

 Pisidium pusillum (Gmelin). — Heeg and Sneek. 

 Pisidium obtusale Pfeiff.— Pleerenveen. 



Dreissensia polymorpha (Pall.). — Heeg, and on Anodonta 

 cygncea at Grouw. 



Limax tenellus IMuller in Oxfordshire. — A search in the extensive beech 

 woods on the Chilterns in the neighbourhood c>f Checkendon, near Reading, 

 early in September, 1909, was rewarded by finding examples of Z,/w«;i: /i?;/(?////j- var. 

 cerea. The slugs, which were feeding on fungi, were associated with Ation sub- 

 fusctis, A. intermedins and var. grisen, and A. ater with its varieties castanea, 

 siiccinea and ocidata. Beneath a prostrate tree trunk in one wood I found a single 

 specimen of Liinax cinereo-niger var. hedleyi. — Chas. Oldham {Read before thi 

 Society^ November lOth, 1909). 



Carychium minimum near Limerick.— At the end of January while walking 

 '"crosscountry" I came across a deposit of drift of various kinds, and thinking 

 that it might contain some shells I took home just one handful to examine at my 

 leisure. On doing so I found a few species represented, but Carychium minimum 

 seemed to be rather plentiful, so much so that I started to count them and from one 

 small parcel of drift, composed of sticks, leaves, grasses, etc., I obtained no less 

 than 217 specimens of Carychinm minimum. I intend to gather some more of the 

 drift, and if any reader wishes some, I will endeavour to supply it on receipt of 

 of address. —Harry Fogerty {Read before the Society, P'ebruary gth, 1910). 



