|   | 
site | 
site # (info) | 
collection date | 
kind | 
depth | 
substrate | 
salin | 
comments | 
reference | 
| A | 
south beach Dune (Duehne), Helgoland Island, Germany | 
746
  map | Aug 1963 | 
  | 
  | 
medium sand | 
  | 
  | 
Dorjes J (1968): 409; also biogeography and ecology on this and other German Bay species in (citation)- 78-115. | 
| B | 
Herdla (Herlo), off  Bergen, Norway | 
56
  map | prior 1975 | 
  | 
5 m | 
mud | 
  | 
  | 
Dorjes J, Karling TG (1975): 187 | 
| C | 
Gullmaren, Fiskebackskil (Fiskebäckskil), western Sweden | 
23
  map | prior 1975 | 
  | 
5-10 m | 
mud | 
  | 
  | 
Dorjes J, Karling TG (1975): 187 | 
| D | 
Yealm Estuary, Plymouth, England | 
1713
  map | prior 1975 | 
  | 
  | 
mud | 
  | 
and Jenny Cliff. | 
Dorjes J, Karling TG (1975): 187 | 
| E | 
Tvarminne (Tvärminne, Tverminne, Tvaerminne), Kvarnskar (Kvärnskar), Finnish Bay, Finland | 
886
  map | prior 1975 | 
  | 
1-2 m | 
sand | 
  | 
  | 
Dorjes J, Karling TG (1975): 187 | 
| F | 
Gullmarfjord, by Bay of Kristineberg, Sweden | 
836
  map | prior 1975 | 
type locality | 
5-10 m | 
mud | 
  | 
  | 
Dorjes J, Karling TG (1975): 187 |