Other formats

    TEI XML file   ePub eBook file  

Connect

    mail icontwitter iconBlogspot iconrss icon

The Atoll of Funafuti, Ellice group : its zoology, botany, ethnology and general structure based on collections made by Charles Hedley of the Australian Museum, Sydney, N.S.W.

Cylichna erecta, sp. nov

Cylichna erecta, sp. nov.

(Fig. 46).

Shell cylindrical, truncated above, bevelled out-wardly round the vertex, rounded below and compressed around the basal axis. Colour white.
Fig. 46.

Fig. 46.

Sculpture—the only specimen is too worn for exact description; it seems to have been girt by numerous broad and shallow spiral grooves. Aperture nearly perpendicular; lip produced medially; columella broadly reflected, apparently minutely plicated. Spire umbilicate, a shallow crater into which each whorl descends by steps. Length 4, breadth 1¾ mm.

A single rather worn example from the lagoon beach.

This species appears to be quite distinct from others of the genus. Those that share the cylindrical shape being C. discus, Watson, more truncated anteriorly; C. protracta, Gould, three times larger; C. involuta, Adams, C. cylindracea, Pennant, and C. alba, Brown, which appear to have the spire covered. No comparison can be instituted with a mass of unfigured species with which authors (Adams being chief sinner) have oppressed descriptive conchology.