Aplysia nigrocincta

(Original description in German) In spirit (preserved specimen) only 17 mm long, 11 mm high, and 7 mm wide. The body is smooth and light brown; the free edges of the foot lobes, the margin of the foot sole, and the edge of the rather large opening in the mantle (shield) are black—usually continuous, though occasionally somewhat mottled. The shell is strongly arched and relatively large, a vivid amber-yellow, appearing reddish in transmitted light through the shield. It is spoon-shaped, with a shallow notch and a strongly incurved tip, measuring 11.5 mm in length, 8 mm in width, and 5 mm in height—occupying more than half the total length of the contracted animal.