Bull. zool. Norn., vol. 42, pt 1 , April 1985 27 OPINION 1292 VOLUTA PAPILIO LINK, 1807 (GASTROPODA): CONSERVED RULING. — ( 1 ) Under the plenary powers it is hereby ruled that the specific name papilio Link, 1807, as published in the binomen Valuta papilio, is to be given precedence over the specific name leucostoma Gmelin, 1791, as published in the binomen Valuta leucostoma, whenever the two Principle of Priority and the Principle of Homonymy. (2) The following names are hereby placed on the Official List of Specific Names in Zoology with the Name Numbers specified: (a) papilio Link, 1 807, as published in the binomen Voluta papilio, with an endorsement that it is to be given precedence over leucostoma Gmelin, 1791, as published in the binomen Voluta leucostoma, whenever the two names are considered synonyms (Name Number 2921); (b) leucostoma Gmelin, 1791, as pubUshed in the binomen Voluta leucostoma, with an endorsement that it is not to be given priority over Voluta papilio Link, 1807, whenever the two names are considered synonyms (Name Number 2922). HISTORY OF THE CASE Z.N.(S.)1777 An application for the suppression of three unused specific names of species of Voluta was first received from Dr W. O. Cernohorsky {Auckland Institute and Museum, New Zealand) on 29 September 1966. It was sent to the printer on 8 November 1966 and published on 6 March 1967 in Bull, zool. Nom. vol. 24, pp. 53-54. Public notice of the possible use of the plen-ary powers in the case was given in the same part of the Bulletin, to the statutory serials and to two malacological serials. Owing to the then unsatisfactory state of affairs surrounding Article 23b, the case was set aside. A revised application was received on 24 November 1978. This showed that two of the three names originally involved could be dealt with automatically; only Voluta leucostoma Gmelin, 1791 was still a threat to the stability of nomenclature. After an exchange of correspondence this application was sent to the printer on 15 April 1980 and pubUshed on 25 September 1980 in Bull. zool. Nom. vol. 37, pp. 149-151. Public notice of the possible use of the plenary powers in the case was given in the same part of the Bulletin as well as to the statutory serials, to seven general serials and two malacological serials. No comment was received. DECISION OF THE COMMISSION On 12 March 1984 the members of the Commission were invited to under the Three-Month Rule on Voting Paper (1983)7 for or against the
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