site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | |
---|---|---|---|---|---|---|---|---|---|
A | Criccieth, Lleyn Peninsula, North Wales, United Kingdom | 1865 map | 1958-1961 | fine sand | common at LWS. | Boaden PJS (1963): 85 | |||
B | Llanddwyn, Anglesey, North Wales, United Kingdom | 1867 map | 1958-1961 | medium sand with shell overlay | abundant at MTL. This species related to M. baltica but identification uncertain. | Boaden PJS (1963): 85 |