butitisnotpossibletogiveanadequateideaofthehigherfeelingsofwonder，astonishment，anddevotion，whichfillandelevatethemind。
April19th——LeavingSocego，duringthetwofirstdays，weretracedoursteps。Itwasverywearisomework，astheroadgenerallyranacrossaglaringhotsandyplain，notfarfromthecoast。Inoticedthateachtimethehorseputitsfootonthefinesiliceoussand，agentlechirpingnoisewasproduced。Onthethirddaywetookadifferentline，andpassedthroughthegaylittlevillageofMadredeDeos。ThisisoneoftheprincipallinesofroadinBrazil；yetitwasinsobadastatethatnowheeledvehicle，exceptingtheclumsybullock-wagon，couldpassalong。Inourwholejourneywedidnotcrossasinglebridgebuiltofstone；andthosemadeoflogsofwoodwerefrequentlysomuchoutofrepair，thatitwasnecessarytogoononesidetoavoidthem。Alldistancesareinaccuratelyknown。Theroadisoftenmarkedbycrosses，intheplaceofmilestones，tosignifywherehumanbloodhasbeenspilled。Ontheeveningofthe23rdwearrivedatRio，havingfinishedourpleasantlittleexcursion。
DuringtheremainderofmystayatRio，IresidedinacottageatBotofogoBay。Itwasimpossibletowishforanythingmoredelightfulthanthustospendsomeweeksinsomagnificentacountry。InEnglandanypersonfondofnaturalhistoryenjoysinhiswalksagreatadvantage，byalwayshavingsomethingtoattracthisattention；butinthesefertileclimates，teemingwithlife，theattractionsaresonumerous，thatheisscarcelyabletowalkatall。
ThefewobservationswhichIwasenabledtomakewerealmostexclusivelyconfinedtotheinvertebrateanimals。TheexistenceofadivisionofthegenusPlanaria，whichinhabitsthedryland，interestedmemuch。Theseanimalsareofsosimpleastructure，thatCuvierhasarrangedthemwiththeintestinalworms，thoughneverfoundwithinthebodiesofotheranimals。
Numerousspeciesinhabitbothsaltandfreshwater；butthosetowhichIalludewerefound，eveninthedrierpartsoftheforest，beneathlogsofrottenwood，onwhichIbelievetheyfeed。Ingeneralformtheyresemblelittleslugs，butareverymuchnarrowerinproportion，andseveralofthespeciesarebeautifullycolouredwithlongitudinalstripes。Theirstructureisverysimple：nearthemiddleoftheunderorcrawlingsurfacetherearetwosmalltransverseslits，fromtheanterioroneofwhichafunnel-