| Pratoplana galeata Ehlers, 1974 | Sep 1973 |  | sand | west side of the island, middle and upper sand slope.  Few individuals. | 
| Anthopharynx sacculipenis Ehlers, 1972 | Sep 1973 |  | sand | west site, middle and upper sand slope.  several specimens. | 
| Adenopharynx mitrabursalis Ehlers, 1972 | Sep 1973 |  | fine sand, mud | find sand mud flat, 3 individuals. | 
| Promesostoma rostratum Ax, 1951 | Sep 1973 |  | mud with fine sand | Mud flat with fine sand.  Several specimens. | 
| Ptychopera westbladi (Luther, 1943) Den Hartog, 1964 | Sep 1973 |  | mud, fine sand | west site.  find sand, mud Watt.  Several specimens. | 
| Proxenetes ampullatus Ax, 1971 | Sep 1973 |  | mud, fine sand | West side.  fine sand mud Watt.  1 specimen. | 
| Trisaccopharynx roscoffensis Ehlers, 1980 | Sep 19, 1973 |  | fine muddy sand | eulittoral of the west side of the Ile de Callot (200 m to the left of the Church), near the low tide-level.  Living specimens, one whole mount, No. P 771. | 
| Promesostoma meixneri roscoffense Ehlers, 1980 | Sep 19, 1973 |  | fine muddy sand | eulittoral of the west side of the Ile de Callot (200 m to the left of the Church), near the low tide-level.  Living specimens, four whole mounts, No. P 781. | 
| Ptychopera purasjokii Ax, 1971 | Sep 19, 1973 |  | fine muddy sand | eulittoral of the west side of the Ile de Callot (200 m to the left of the Church), near the low tide-level.  Living specimens, four whole mounts. | 
| Messoplana roscoffensis Ehlers, 1980 | Sep 19, 1973 |  | coarse sand | at different places of the eulittoral of the west side of the Ile de Callot (200 m to the left of the Church), near the low tide-level.  Living specimens, two whole mounts, No. P. 811 | 
| Convoluta roscoffensis Graff, 1891 | Sep 19, 1973 |  | fine muddy sand | from the eulittoral flat of the west side of the Ile de Callot (200 m to the left of the Church). | 
| Monocelis lineata (Müller, 1773) | Sep 19, 1973 |  | fine muddy sand | from the eulittoral flat of the west side of the Ile de Callot (200 m to the left of the Church). | 
| Monocelopsis otoplanoides Ax, 1951 | Sep 19, 1973 |  | fine muddy sand | from the eulittoral flat of the west side of the Ile de Callot (200 m to the left of the Church). | 
| Cirrifera cirrifera Sopott, 1972 | Sep 19, 1973 |  | fine muddy sand | from the eulittoral flat of the west side of the Ile de Callot (200 m to the left of the Church).  The animals measured more than 1mm. | 
| Adenopharynx mitrabursalis Ehlers, 1972 | Sep 19, 1973 |  | fine muddy sand | from the eulittoral flat of the west side of the Ile de Callot (200 m to the left of the Church). | 
| Promesostoma rostratum Ax, 1951 | Sep 19, 1973 |  | fine muddy sand | from the eulittoral flat of the west side of the Ile de Callot (200 m to the left of the Church). | 
| Ptychopera westbladi (Luther, 1943) Den Hartog, 1964 | Sep 19, 1973 |  | fine muddy sand | from the eulittoral flat of the west side of the Ile de Callot (200 m to the left of the Church). | 
| Proxenetes ampullatus Ax, 1971 | Sep 19, 1973 |  | fine muddy sand | from the eulittoral flat of the west side of the Ile de Callot (200 m to the left of the Church). | 
| Provortex psammophilus Meixner, 1938 | Sep 19, 1973 |  | fine muddy sand | from the eulittoral flat of the west side of the Ile de Callot (200 m to the left of the Church). | 
| Provortex tubiferus Luther, 1948 | Sep 19, 1973 |  | fine muddy sand | from the eulittoral flat of the west side of the Ile de Callot (200 m to the left of the Church). | 
| Pogaina suecica (Luther, 1948) | Sep 19, 1973 |  | fine muddy sand | from the eulittoral flat of the west side of the Ile de Callot (200 m to the left of the Church). | 
| Pogaina kinnei Ax, 1970 | Sep 19, 1973 |  | fine muddy sand | from the eulittoral flat of the west side of the Ile de Callot (200 m to the left of the Church). | 
| Convoluta roscoffensis Graff, 1891 | Sep 19, 1973 |  | coarse sand | from the beach slope, eulittoral of the west side of the Ile de Callot (200 m to the left of the Church). | 
| Paromalostomum fusculum Ax, 1952 | Sep 19, 1973 |  | coarse sand | from the beach slope, eulittoral of the west side of the Ile de Callot (200 m to the left of the Church). | 
| Myozonaria falcis Sopott-Ehlers, 1976 | Sep 19, 1973 |  | coarse sand | from the beach slope, eulittoral of the west side of the Ile de Callot (200 m to the left of the Church). | 
| Monocelopsis otoplanoides Ax, 1951 | Sep 19, 1973 |  | coarse sand | from the beach slope, eulittoral of the west side of the Ile de Callot (200 m to the left of the Church). | 
| Parotoplana papii Ax, 1956 | Sep 19, 1973 |  | coarse sand | from the beach slope, eulittoral of the west side of the Ile de Callot (200 m to the left of the Church). | 
| Nematoplana coelogynoporoides Meixner, 1938 | Sep 19, 1973 |  | coarse sand | from the beach slope, eulittoral of the west side of the Ile de Callot (200 m to the left of the Church). | 
| Coelogynopora gallica Sopott-Ehlers, 1976 | Sep 19, 1973 |  | coarse sand | from the beach slope, eulittoral of the west side of the Ile de Callot (200 m to the left of the Church). | 
| Anthopharynx sacculipenis Ehlers, 1972 | Sep 19, 1973 |  | coarse sand | from the beach slope, eulittoral of the west side of the Ile de Callot (200 m to the left of the Church).  Mature animals were 0.5 mm long. | 
| Pratoplana galeata Ehlers, 1974 | Sep 19, 1973 |  | coarse sand | from the beach slope, eulittoral of the west side of the Ile de Callot (200 m to the left of the Church). |