Direction 54 Addition to the Official List of family- group names in Zoology, or, as the case may be, to the Official Index of Rejected and Invalid family-group names in Zoology of the family-group names Involved in the Cases dealt with in volume 12 of the Opinions and Declarations rendered by the International Commission on Zoological Nomen Clature, other than family-group names already dealt V^ith in those Opinions
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1956, in volume 12, issue 26, pages 457-470
Date published:1956