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Bullina lineata (Gray, 1825)

Description: Shell moderately solid, spire low, suture impressed. Surface with strong spiral cords, becoming rounded towards base; sometimes with axial lamellae between spirals. Aperture narrow at top, broadening towards base; outer lip thin, inner lip sometimes with callus on parietal wall. Columella with weak fold at top Umbilicus a narrow slit or closed by reflected callus. Colour white, with 2 spiral red lines on last whorl, connected by wavy axial lines of same colour.

Size: Up to 18 mm in length, usually less than 10 mm.

Distribution: Tropical and warm temperate Indo-West Pacific Ocean. In Eastern Australia, as far south as eastern Vic.

Habitat: Intertidal and down to 40 m. Feeds on cirratulid polychaete worms. Moderately common in northern NSW as far south as Sydney.

Remarks: The Sea Slug Forum provides a good illustration of the animal at http://www.seaslugforum.net/find/bullline

Figs. 1, 2:  Long Reef, Collaroy, NSW (C.332962)

Fig. 3: Long Reef, Collaroy, NSW. 28 Aug. 1976 (C.105542 Photo Ian Loch)


Copyright Des Beechey 2015