Narrative of a Survey of the Intertropical and Western Coasts of Australia — Vol. 2 / Performed between the years 1818 and 1822

by Philip Parker King

The species is peculiar for its yellow pearly internal coat, and purplish rays.

2. COCHLEOPHORA.

26. Trochus caerulescens. Lam. Hist. 7 18.
Icon. Ency. Meth. plate 444. f. 2. a, b.
Inhab. South-west Coast.

Lamarck describes this shell from a specimen found by Peron.

27. Trochus noduliferus, Lam. Hist. 7 18.

28. Monodonta conica (n.s.)

Testa conica, acuta, imperforata, spiraliter striflto-costata, rufa; costis subtuberculatis, albo-nigro-articulatis; apertura sulcata.
Inhab. -- Mus. Brit.

Shell conical, axis longer than the diameter, the whorl flattened with six spiral raised substriae, which are transversely divided into blackish purple beads with white interspaces, the apex rather acute; the base, rather convex, axis imperforated; the aperture subquadrangular, inside furrowed; the base of the columella lip with a prominent tooth and distinct groove behind it, the upper part rugose; axis eight-twelfths, diameter six-twelfths of an inch. This shell does not appear to be uncommon on the coast of Australia.

29. Monodonta uranulata (n.s.)

Testa depresso-conica, umbilicata, purpurea, albomarmorata, spiraliter papillata; papillis quadri-seriatis, umbilico laevi; infima facie papillata, apertura sulcata.