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.
A shell of the Turbonillidæ, small, conical. Apex of two minute discoidal whorls, half buried in a larger and longitudinally ribbed whorl, to which succeeds a ribbed and tabulate whorl; these page 413together constituting a mucronate tip. On the next whorl, which is also tabulate, the longitudinal sculpture almost disappears and spiral lyræ arise. Subsequently these latter are cancellated by a reappearance of the longitudinal ribs. Aperture oval with a broad and reflected columella, no varix.
Type Rissoa pyrrhacme, Melvill & Standen.