Snout extends to form lateral ridges that can expand into flaps (1).
Behind each eye-tentacle there is a large, smooth-edged, translucent, distally purple-grey neck-lobe that is usually curved into a half siphon (2) for inhalant water on the left of the animal, and for exhalent water, faeces and reproductive products on the right. The respiratory currents are created by the beating of cilia on the dorsal surfaces of the neck-lobes.
The dorsal surface (3) of the snout is purple-grey with vertical and horizontal creases.
The cephalic tentacles are long and purple-grey with a dorsal groove (4) and many fine annular, and other, creases roughening the surface.
The epipodial tentacles (5) are colourless translucent with, like the cephalic tentacles, many fine annular creases and other creases roughening the surface.
There is a black sensory papilla (6) at the base of each epipodial tentacle.

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