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Bulla quoyii, or the brown bubble snail, is a species of sea snail, a marine gastropod mollusc in the family Bullidae, the bubble snails.
Bulla quoyii Wikipedia
The size of an adult shell varies between 35 mm and 55 mm. The thin, yellowish brown shell has an elongate to ovate-quadrangular shape and shows anterior spiral grooves. The shell is wider on the front side. The white aperture becomes narrower at its top. The spire contains six to seven whorls with raised striae. The lip is pale brown. The columella is white. The color of the periostracum varies from greenish to orange.
This species occurs in the North Island of New Zealand and southern Australia, northern Tasmania and the Kermadec islands.