Line drawing from Alder & Hancock (1845-55) which shows more clearly the nearly transparent features in .

The colourless, virtually transparent mantle reveals, embedded within it, very long, glistening, glass-like spicules arranged transversely on the dorsum (1), diagonally on the sides (2) and radially at the anterior (3).
Small reddish spots are arranged in about six lines on the dorsum (4) and about three concentric lines around the flanks (5).
The unobtrusive anal papilla is surrounded by a circle of up to twelve small, unipinnate gills (6) which are so transparent as to be almost invisible.
Alder and Hancock (1845-55) stated that this was the only species of dorid in which they could see the internal eyes (7) when adult, but they are concealed on image 2.