(1977)
Volume
29
Part
3
Page from
137
Helicodiscus singleyanus (Pilsbry), a small land snail known from North America and, more recently, from scattered sites in Europe, is now recorded from the British Isles. Three shells were found at St. Ouen, Jersey, one at Machynlleth, Dyfed, one in Kew Gardens, Surrey and two at Whipanade, Bedfordshire. Of the European snails found in leaf litter, H. singleyanus most resembles Vitrea spp., from the shells of which it is distinguished by the large open umbilicus.