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The pictorial museum of animated nature Page . Jaw of Thylacotheiium Soullet ipecimen of young Omithorhynchut Portion of integomtnt Irom the Alidomen of Omithorhynchui Front View of Muidibles of the above IM Mammary Gland nf Omithorhynchoa reduced below the natural aiz Jaw of Ph urolotherinin Page Illustration