Document 27/1—Historical Note on the Proposal to Incorporate in the Regles a Provision Embodying the "Principle of Conservation"

Document 27/2—Stabilization of Zoological Nomenclature by a "Law of Prescription”

Document 27/3—Proposal that the "Principle of Prescription" fix Intragenerie Availability for Validity as well as Validity of Specific Names

Document 27/4—Professor J. Chester Bradley's Proposals Relating to the “Principle of Conservation” incorporated in Article 5, Section 3, of the Draft of the English Text of the Regles

Document 27/5—The Principle of Conservation: Objection to Professor Bradley's Draft and Submission of a Revised Proposal

Document 27/6—A Critique of Professor Chester Bradley's "Principle of Conservation”

Document 27/7—Draft “Regles”, Article 5: Continuity and Universality of Usage, Discussion and Proposals

Document 27/8—Comment on the "Principle of Conservation"

Document 27/9—Objection to the introduction of a “Principle of Conservation” into the Regles

Document 28/1—Note on the Form of Professor Pierre Bonnet's Paper on the homogeneity and Correction of Zoological Names and the Procedure Proposed to be Adopted at the London Meetings for Dealing with the Issues so Raised