Nova Guinea : résultats de l'expédition scientifique néerlandaise à la Nouvelle-Guinée en 1903[-1920] . es I hâve seen ; the dépres-sion of the upper part of whorls is narrower and less flattened than usual, this may partly bedue to smaller size (youth ?) for in the upper whorls of my spécimens the same charactermay be observed, though not so pronounced. Fam. Lamarck. 1. Nassa (Zeuxis) unicolor Kiener. Fig. 1. Kiener. Coq. Viv. Vol. VIII, Buccinum, p. 60, PL 19, fig. 69. New Guinea. Merauke, 1904. (Dr. Koch leg.)A few very fine spécimens agreeing with KlENERs figure and some sma
Nova Guinea : résultats de l'expédition scientifique néerlandaise à la Nouvelle-Guinée en 1903[-1920] . es I hâve seen ; the dépres-sion of the upper part of whorls is narrower and less flattened than usual, this may partly bedue to smaller size (youth ?) for in the upper whorls of my spécimens the same charactermay be observed, though not so pronounced. Fam. Lamarck. 1. Nassa (Zeuxis) unicolor Kiener. Fig. 1. Kiener. Coq. Viv. Vol. VIII, Buccinum, p. 60, PL 19, fig. 69. New Guinea. Merauke, 1904. (Dr. Koch leg.)A few very fine spécimens agreeing with KlENERs figure and some smaller ones hâve M. M. SCHEPMAN, LAND- AND FRESHWATER MOLLUSCA ETC. 189 been collected ; I hâve made use of the discarded generic name Nassa, as the opinion ofauthors often disagrees as to the name and extension of the group. The radula has a médiantooth with 12 cusps and the latéral ones with 2 cusps, of which the proximal one has itsdistal margin smooth or with one (as figured) or more small denticles, which are often scarcelyvisible; no accessory teeth could be observed. Number of rows Fig. MURICIDAE. Cymia Môrch. 1. Cymia carinifera Lamarck, var. simplex n. var. PI. VIII, fig. 1. Shell differing from the type by being quite destitute of real tubercles and by themuch narrower aperture. New Guinea. Merauke, 1904. (Dr. Koch leg.) This shell has much puzzled me and I was nearly ready to describe it as a newspecies, however the gênerai appearance and sculpture, induced me to consider it merely asa variety of the very variable C. carinifera; only the upper whorls display very faint tracesof tubercles, the last one quite smooth, but for the fine sculpture. The nearest figure at hand,is that of Reeve (Conch. le, Purpura, sp. 26), the figures of KlENER, even his fig. 36^, aremuch more elaborate. 2. Cymia dubia n. sp. PL VIII, fig. 2. Shell fusiformly-ovate, greyish-brown wit darker keels. Whorls 6.,, the nuclear onessmooth and rounded, subséquent ones in g
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