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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1854 Excerpt: ...Hab.--New South Wales, Moreton Bay in lat. 27, Port Jackson, and Twofold Bay; South Africa, Algoa Bay. Attached, in Australia, to littoral rocks and shells; often associated with T. mtrpurascens, Chthamalus antennatia, and Cttlophragmus polymems; Mus. Brit., Cuming, Krauss, Darwin, Stutchbury. General Appearance.--Shell steeply conical, often rather convex; dirty or brownish white, feebly tinted with pink; external surface generally much disintegrated, and having in the upper part a pillared appearance, owing to the exposure of the upfilled, large, square, parietal I am greatly indebted to Professor Krauss for having sent me, for examination, tlie unique specimen collected by himself in Algoa Bay. There can be nodjjulit of the identity of the African and Australian specimens. It isa singular circumstance that the sime species should occur in these two distant places, and, as far as at present known, not in the intermediate, more tropical coasts. tubes, and, in the lower part, a striated (and sometimes serrated) appearance, from the exposure of the parallel, approximate plates, with which the outer lamina of the shell is internally strengthened. In only a few young specimens, the whole outer lamina of the shell was well preserved; and in these the surface was very smooth, and even glossy, giving to i he specimens a quite diiferent aspect; even in partially corroded specimens, the lower part of the shell sometimes is quite smooth. Generally, the radii are developed; in most specimens they are narrow, but sometimes of moderate width; their summits are oblique, aud their edges often notched or toothed. The recipient furrow, in each opposed compartment, is often almost as wide as the radins itself, and is equally notched. In some much corroded specimens there we...

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