Austrocochlea constricta, common names the southern periwinkle, common periwinkle, or ribbon monodonta, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.

Its color is a lusterless ashen or whitish, obscurely marked with black zigzag lines and stripes, or with spiral articulated zones or with spiral stripes of black.

The first one is eroded, the penultimate is very strongly spirally tricostate.

The outer and basal lips are either thick and multilirate within, or rather thin and slightly furrowed at the places of the principal carinae.

The short columella is oblique, subdentate at its base and at the insertion spreading in a strong callus upon the parietal wall.