Phylum: Ochrophyta   Family: Chordariaceae

Hecatonema terminale  (Kützing) Kylin, 1937

An erratic distribution of records and rarely recorded. Mainly epiphytic on other algae and less commonly on rock and shells. Not an authenticated record

References: 
Fletcher (1987) - Seaweeds of the British Isles, Volume 3 Fucophyceae (Phaeophyceae), Part 1