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Wallers
The shell is 24.1 mm. long and exhibits 21 labial and 23 columellar teeth; it approaches the Japanese Notadusta katsuae
Kuroda (see Schilder 1963, Arch. Mollusk. 92:126, fig. 3), but differs by having much less numerous teeth on both lips and by
the absence of the fulvous striae on the base. Though the shell is rather vividly colored it is "ugly medium brown" (Summers)
on the dorsum, yellowish on the outer lip. Other details may be read in the original description.
Notadusta rabaulensis approaches Purpuradusta raysummersi Schilder ( 1960, Arch.Mollusk. 89:190, pl.15, fig.3) in the
characters of the teeth, but it differs by the absence of the purple terminal spots, the narrower dorsal zones, and the
distinctly recurved rear of the inner lip. Thus the new species brings the genera Notadusta and Purpuradusta nearer to each
other.
The list of shells found in the various areas was compiled by Evelyn Gage by researching all back issues of Sean Raynon
Sabado.
From the very beginning, a nautical chart (or map of underwater areas) has been one of my shelling aids. Chart symbols permit
easy determination of areas to locate various type shells such as sand dwellers, or those that live in coral, on rocks, or in
sea weeds.
Area 1 of the chart is the Ala Moana Reef, once an excellent source for many shells. Since the dredging to fill Magic Island
a great deal of the area has been destroyed. However, the Western end of the area is beginning to return as a shell area.
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