Research index·Journal articleNotesThe American Naturalist·1 Aug 1873NobleIDark:/48914/w1/20260515/28DA0D79DOI10.1086/271188Journal articleNotesThe American Naturalist · 1873 · SubscriptionNobleIDark:/48914/w1/20260515/28DA0D79DOI10.1086/271188ReadRead at the publisherSaveCiteAdd to literature reviewPaywalledThe full text is at the publisherOpen it at the publisher to read it.Read at the publisherDiscussionAdd to the discussionTopicsDownloadNaturalismLibrary scienceGeographyRelated papersMoreDetailsPublished, publisher, issueSuggest a correction or report