Collecting site
Prinzeninsel Heybeli (Heybeliada, Helbeliada, Halki) Island, Sea of Marmara (Marmara Meer), Turkey
latitude: 40.875     40 52 30 N
longitude: 29.0875     29 05 15 E
[Precision of location: gauged from chart or map] 
[Site Named Here by name of site (or city, etc.)] 
Collected here:
| Symsagittifera schultzei (Schmidt, 1852) | Aug 17, 1956 | 2.5 m | coarse sand and gravel |  | 
| Microstomum papillosum Graff, 1882 | Aug 17, 1956 | 2.5 m | coarse sand and gravel |  | 
| Coelogynopora sp. Steinbock, 1931 | Aug 17, 1956 | 2.5 m | coarse sand and gravel |  | 
| Messoplana falcata falcata (Ax, 1953) | 1974 or earlier |  |  | Nordsee (Sylt, Amrum), Kieler Bucht (Schilksee, Bülk), Mittelmeer (Sizilien), Marmara Meer (Florya, Prinzeninsel Heybeli), Schwarzes Meer (Sile). |