or29，iftheprobablyimportedplantsbesubtracted。Hencewehavethetrulywonderfulfact，thatinJamesIsland，ofthethirty-eightGalapageianplants，orthosefoundinnootherpartoftheworld，thirtyareexclusivelyconfinedtothisoneisland；andinAlbemarleIsland，ofthetwenty-sixaboriginalGalapageianplants，twenty-twoareconfinedtothisoneisland，thatis，onlyfourareatpresentknowntogrowintheotherislandsofthearchipelago；andsoon，asshownintheabovetable，withtheplantsfromChathamandCharlesIslands。Thisfactwill，perhaps，berenderedevenmorestriking，bygivingafewillustrations：——
thus，Scalesia，aremarkablearborescentgenusoftheCompositae，isconfinedtothearchipelago：ithassixspecies：onefromChatham，onefromAlbemarle，onefromCharlesIsland，twofromJamesIsland，andthesixthfromoneofthethreelatterislands，butitisnotknownfromwhich：
notoneofthesesixspeciesgrowsonanytwoislands。Again，Euphorbia，amundaneorwidelydistributedgenus，hashereeightspecies，ofwhichsevenareconfinedtothearchipelago，andnotonefoundonanytwoislands：
AcalyphaandBorreria，bothmundanegenera，haverespectivelysixandsevenspecies，noneofwhichhavethesamespeciesontwoislands，withtheexceptionofoneBorreria，whichdoesoccurontwoislands。ThespeciesoftheCompositaeareparticularlylocal；andDr。Hookerhasfurnishedmewithseveralothermoststrikingillustrationsofthedifferenceofthespeciesonthedifferentislands。Heremarksthatthislawofdistributionholdsgoodbothwiththosegeneraconfinedtothearchipelago，andthosedistributedinotherquartersoftheworld：inlikemannerwehaveseenthatthedifferentislandshavetheirproperspeciesofthemundanegenusoftortoise，andofthewidelydistributedAmericangenusofthemocking-thrush，aswellasoftwooftheGalapageiansub-groupsoffinches，andalmostcertainlyoftheGalapageiangenusAmblyrhynchus。
Thedistributionofthetenantsofthisarchipelagowouldnotbenearlysowonderful，if，forinstance，oneislandhadamocking-thrush，andasecondislandsomeotherquitedistinctgenus，——ifoneislandhaditsgenusoflizard，andasecondislandanotherdistinctgenus，ornonewhatever；——