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Prinzeninsel Heybeli (Heybeliada, Helbeliada, Halki) Island, Sea of Marmara (Marmara Meer), Turkey
latitude: 40.875
longitude: 29.0875
Precision of location: Gauged from chart or map
Site Named Here: By name of island, bay, strait, lake, river, or stream, etc., named in source publication
| Archilina endostyla | Sep 29, 1956 | 50-80 cm | fine to medium sand | |
| Proxenetes plebeius | Aug 17, 1956 | 50-80 cm | fine to medium sand | sparse detritus |
| Proxenetes falcatus | Aug 17, 1956 | 50-80 cm | fine to medium sand | detritus poor |