T. tartantella (Ihering, 1886).
1: single, elongate process curves backwards from the base of each rhinophore.
2: single, elongate process curves backwards at each side of the gills.
3: anterior of foot has distinct protruding propodial tentacles.
4: no linear processes on the anterior edge of the head.
5: large oral tentacles.
Cornwall, England. October 2020. © D. Fenwick www.aphotomarine.com