(Alder & Hancock, 1842)
Description:
This is one of the most rare British nudibranchs, found only once in living memory (near Salcombe, Devon). It may reach 29 mm in extended length, pale brown in body-colour, with rust coloured blotches. The cerata are pale brown, with 2-3 rusty brown bands and a distal white or yellow zone. There are up to 7 rows of cerata, with 4-7 in each half-row; they are elongated and slender. The tentacles are all brownish basally, with a rusty orange-brown band and a pale yellow tip.
Habitat:
It appears to feed upon the hydroid Nemertesia.
Distribution:
E. vittatus has been reliably reported only from Co. Galway, the North Sea and, as noted above, from Devon (Distr. E. vittatus).