1: rhinophore with many opaque white granules and a few near the rim of its basal sheath.
2: brown pigment on the mesial face of sheath.
3: elongated, white anal papilla between the first and second ceras. 4: large, brown, hermaphrodite, genital papilla.
5: very long terminal tubercle on ceras.
6: three complete concentric rings of elongated tubercles.
7: partially formed ring of tubercles at the base of the ceras.
Menai Strait, Wales. February 2014.