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Show 194 MR. G. F. ANGAS ON AUSTRALIAN MOLLUSCA. [Feb. 14, This Melania-shaiped, smooth, black species is not uncommon under stones at low water, in some parts of Port Jackson. It belongs to the same group as M. glabra, which represents it in South Australia and Tasmania. Length 2 inches 8 lines. 46. MITRA SOLIDA. Mitra solida, Reeve, P. Z. S. 1844 ; Conch. Icon. Mitra, pl. 3. f. 18. Of this very rare Mitre, which is of a fulvous-bay colour, irregularly flaked with white, a single specimen, habitat unknown, was described and figured by Reeve, from the collection of Mr. Norris. A second example, in a living state, was dredged by myself off Middle Head, Port Jackson, in 5 fathoms. It was also obtained in 6 fathoms in Port Jackson, by Mr. MacGillivray, during the voyage of H.M.S. 'Rattlesnake,' and erroneously referred to as M. sordida in Prof. Forbes's paper on the "Mollusca" in the Appendix to the account of that voyage. Length 1 inch 6 lines. 47. *MITRA (CANCILLA) STRANGEI. Cancilla strangei, Angas, P. Z. S. 1867, p. 110. A pretty little fusiform white shell, with the whorls ridged and cancellated. It somewhat resembles Mitra isabella in miniature. Dredged in Middle Harbour. It has also been found at Moreton Bay. Length 7 lines. Subfam. COLUMBELLIN^E. 48. COLUMBELLA VERSICOLOR. Columbella versicolor, Sow. P. Z. S. 1832, p. 119 ; Reeve, Conch. Icon. pl. 11. f. 51 a, b. Under stones at low water in Port Jackson. It is also found in New Caledonia and Woodlark Island. Length \ inch. 49. COLUMBELLA (MITRELLA) SEMICONVEXA. Buccinum semiconvexum, Lam. Anim. sans Vert. x. p. 171; Reeve, Conch. Icon. pl. 18. f. 95 c, b. Common under stones about Watson's Bay. The Port Jackson specimens are smaller and more elongated than those from Tasmania (which are typical), and have not the same flesh-coloured tinge. This is a very variable species ; and it is probable that the C. rosacea and C, saccharata of Reeve are only extreme pink varieties from Tasmania. An orange variety occurs at Lacepede Bay, in South Australia. Length 9 lines. 50. COLUMBELLA (MITRELLA) AUSTRALIS. Columbella australis, Gaskoin, P. Z. S. 1851, p. 5 ; Reeve, Conch. Icon. pl. 15. f. 78 a, b, & 188. Under stones at low tide, in company with C. semiconvexa, from |