VAUGHAN : MOLLUSCA OF SOUTH WALES. I3 



Planorbis contortus (I..). — Very plentiful in Llanbucklyn Pool, 

 Radnorshire, and sparingly among water-lilies at the lower end of 

 TJangorse Lake. 



Planorbis glaber Jeff. — A few in a small stream, about half a mile 

 from Llangorse Lake. 



Limnaea palustris (Miiller). — Very plentiful, but of small size 

 in Llangorse Lake. 



Physa fontinalis (L.). — I have found a few in Llangorse Lake, 

 but they are scarce and very small. 



Unio pictorum (L.). — Very abundant in a pool near Glasbury, 

 one of a chain of pools which mark an old course of the river Wye ; 

 also in Llangorse Lake. 



Pisidium amnicum (Miiller). — 



var. laeviuscula Moq.-Tan. — This var. seems to be the only 

 form of this shell found in Llangorse. 



Pisidium obtusale Pfr. — Very abundant in Llangorse Lake. 



Pisidium gassiesianum Dup. — A few in the pools at Glasbury. 



Carmarthenshire. 



Arion ater (L.). — Very abundant everywhere. 



Arion subfuscus (Drap.). — Common at Laugharne. 



Arion hortensis Fer. — Abundant. 



Arion intermedius Normand. — Laugharne. 



Milax sowerbyi (Fer.). — Under stones at Laugharne. 



Limax arborum Bouch. -Chant.— In a wood on the Towy, near 

 Llandovery. 



Vitrea lucida (Drap.). — Laugharne. 



Vitrea cellaria (Miiller). — Near Llandovery. 



Vitrea alliaria (Vliller). — Llandovery. 



Vitrea radiatula (Alder). — In moss on road-side. 



Vitrea pura (Alder). — Parish of Llandeusant. 



Vitrea crystallina (Miiller). — Near Llangatdog. 



Pyramidula rotundata (Miiller). — Common everywhere. 



Acanthinula aculeata (Miiller). — In moss, Laugharne. 



Carychium minimum Miiller. — In moss, Laugharne and 

 Llanwnda. 



Planorbis spirorbis (L.). — Common, Laugharne Marshes, and 

 in a pond at Llanwnda Station. 



Pisidium pusillum (Gmelin). — Abundant, Laugharne Marshes 

 ■and Llanwnda. 



Pisidium gassiesianum Dup. — Laugharne Marshes. 



