Polycera quadrilineata. Site: N of Bull Point,  Rathlin Island
 Polycera quadrilineata. Event number: 20190514/02. Site: N of Bull Point, Rathlin Island. 2019-05-14. Photograph © Bernard Picton. (2/35) 
 Bernard Picton (2026). Photograph of Polycera quadrilineata. Site: N of Bull Point, Rathlin Island. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=_b197284.jpg. Accessed on 2026-11-04