Theinhabitantsbelievethattheseanimalsareabsolutelydeaf;certainlytheydonotoverhearapersonwalkingclosebehindthem。Iwasalwaysamusedwhenovertakingoneofthesegreatmonsters,asitwasquietlypacingalong,toseehowsuddenly,theinstantIpassed,itwoulddrawinitsheadandlegs,andutteringadeephissfalltothegroundwithaheavysound,asifstruckdead。Ifrequentlygotontheirbacks,andthengivingafewrapsonthehinderpartoftheirshells,theywouldriseupandwalkaway;——
butIfounditverydifficulttokeepmybalance。Thefleshofthisanimalislargelyemployed,bothfreshandsalted;andabeautifullyclearoilispreparedfromthefat。Whenatortoiseiscaught,themanmakesaslitintheskinnearitstail,soastoseeinsideitsbody,whetherthefatunderthedorsalplateisthick。Ifitisnot,theanimalisliberatedanditissaidtorecoversoonfromthisstrangeoperation。Inordertosecurethetortoise,itisnotsufficienttoturnthemliketurtle,fortheyareoftenabletogetontheirlegsagain。
TherecanbelittledoubtthatthistortoiseisanaboriginalinhabitantoftheGalapagos;foritisfoundonall,ornearlyall,theislands,evenonsomeofthesmalleroneswherethereisnowater;haditbeenanimportedspecies,thiswouldhardlyhavebeenthecaseinagroupwhichhasbeensolittlefrequented。Moreover,theoldBucaniersfoundthistortoiseingreaternumberseventhanatpresent:WoodandRogersalso,in1708,saythatitistheopinionoftheSpaniards,thatitisfoundnowhereelseinthisquarteroftheworld。Itisnowwidelydistributed;butitmaybequestionedwhetheritisinanyotherplaceanaboriginal。ThebonesofatortoiseatMauritius,associatedwiththoseoftheextinctDodo,havegenerallybeenconsideredasbelongingtothistortoise;ifthishadbeenso,undoubtedlyitmusthavebeenthereindigenous;butM。Bibroninformsmethathebelievesthatitwasdistinct,asthespeciesnowlivingtherecertainlyis。
TheAmblyrhynchus,aremarkablegenusoflizards,isconfinedtothisarchipelago;therearetwospecies,resembling[picture]
eachotheringeneralform,onebeingterrestrialandtheotheraquatic。
ThislatterspeciesA。cristatuswasfirstcharacterizedbyMr。Bell,whowellforesaw,fromitsshort,broadhead,andstrongclawsofequallength,thatitshabitsoflifewouldturnoutverypeculiar,anddifferentfromthoseofitsnearestally,theIguana。Itisextremelycommononalltheislandsthroughoutthegroup,andlivesexclusivelyontherockysea-beaches,beingneverfound,atleastIneversawone,eventenyardsin-shore。Itisahideous-lookingcreature,ofadirtyblackcolour,stupid,andsluggishinitsmovements。Theusuallengthofafull-grownoneisaboutayard,buttherearesomeevenfourfeetlong;alargeoneweighedtwentypounds:
ontheislandofAlbemarletheyseemtogrowtoagreatersizethanelsewhere。
Theirtailsareflattenedsideways,andallfourfeetpartiallywebbed。
Theyareoccasionallyseensomehundredyardsfromtheshore,swimmingabout;andCaptainCollnett,inhisVoyagesays,“Theygotoseainherdsa-fishing,andsunthemselvesontherocks;andmaybecalledalligatorsinminiature。”Itmustnot,however,besupposedthattheyliveonfish。
Wheninthewaterthislizardswimswithperfecteaseandquickness,byaserpentinemovementofitsbodyandflattenedtail——thelegsbeingmotionlessandcloselycollapsedonitssides。Aseamanonboardsankone,withaheavyweightattachedtoit,thinkingthustokillitdirectly;
butwhen,anhourafterwards,hedrewuptheline,itwasquiteactive。
Theirlimbsandstrongclawsareadmirablyadaptedforcrawlingovertheruggedandfissuredmassesoflava,whicheverywhereformthecoast。Insuchsituations,agroupofsixorsevenofthesehideousreptilesmayoftentimesbeseenontheblackrocks,afewfeetabovethesurf,baskinginthesunwithoutstretchedlegs。
Iopenedthestomachsofseveral,andfoundthemlargelydistendedwithmincedsea-weedUlvae,whichgrowsinthinfoliaceousexpansionsofabrightgreenoradullredcolour。Idonotrecollecthavingobservedthissea-weedinanyquantityonthetidalrocks;andIhavereasontobelieveitgrowsatthebottomofthesea,atsomelittledistancefromthecoast。
Ifsuchbethecase,theobjectoftheseanimalsoccasionallygoingouttoseaisexplained。Thestomachcontainednothingbutthesea-weed。Mr。
Baynoe,however,foundapieceofcrabinone;butthismighthavegotinaccidentally,inthesamemannerasIhaveseenacaterpillar,inthemidstofsomelichen,inthepaunchofatortoise。Theintestineswerelarge,asinotherherbivorousanimals。Thenatureofthislizard’sfood,aswellasthestructureofitstailandfeet,andthefactofitshavingbeenseenvoluntarilyswimmingoutatsea,absolutelyproveitsaquatichabits;yetthereisinthisrespectonestrangeanomaly,namely,thatwhenfrighteneditwillnotenterthewater。Henceitiseasytodrivetheselizardsdowntoanylittlepointoverhangingthesea,wheretheywillsoonerallowapersontocatchholdoftheirtailsthanjumpintothewater。Theydonotseemtohaveanynotionofbiting;butwhenmuchfrightenedtheysquirtadropoffluidfromeachnostril。IthrewoneseveraltimesasfarasIcould,intoadeeppoolleftbytheretiringtide;butitinvariablyreturnedinadirectlinetothespotwhereIstood。Itswamnearthebottom,withaverygracefulandrapidmovement,andoccasionallyaideditselfovertheunevengroundwithitsfeet。Assoonasitarrivedneartheedge,butstillbeingunderwater,ittriedtoconcealitselfinthetuftsofsea-weed,oritenteredsomecrevice。Assoonasitthoughtthedangerwaspast,itcrawledoutonthedryrocks,andshuffledawayasquicklyasitcould。Iseveraltimescaughtthissamelizard,bydrivingitdowntoapoint,andthoughpossessedofsuchperfectpowersofdivingandswimming,nothingwouldinduceittoenterthewater;andasoftenasIthrewitin,itreturnedinthemannerabovedescribed。Perhapsthissingularpieceofapparentstupiditymaybeaccountedforbythecircumstance,thatthisreptilehasnoenemywhateveronshore,whereasatseaitmustoftenfallapreytothenumeroussharks。Hence,probably,urgedbyafixedandhereditaryinstinctthattheshoreisitsplaceofsafety,whatevertheemergencymaybe,ittheretakesrefuge。
DuringourvisitinOctober,Isawextremelyfewsmallindividualsofthisspecies,andnoneIshouldthinkunderayearold。Fromthiscircumstanceitseemsprobablethatthebreedingseasonhadnotthencommenced。Iaskedseveraloftheinhabitantsiftheyknewwhereitlaiditseggs:theysaidthattheyknewnothingofitspropagation,althoughwellacquaintedwiththeeggsofthelandkind——afact,consideringhowverycommonthislizardis,notalittleextraordinary。
WewillnowturntotheterrestrialspeciesA。Demarlii,witharoundtail,andtoeswithoutwebs。Thislizard,insteadofbeingfoundliketheotheronalltheislands,isconfinedtothecentralpartofthearchipelago,namelytoAlbemarle,James,Barrington,andIndefatigableislands。Tothesouthward,inCharles,Hood,andChathamislands,andtothenorthward,inTowers,Bindloes,andAbingdon,Ineithersawnorheardofany。Itwouldappearasifithadbeencreatedinthecentreofthearchipelago,andthencehadbeendispersedonlytoacertaindistance。Someoftheselizardsinhabitthehighanddamppartsoftheislands,buttheyaremuchmorenumerousinthelowerandsteriledistrictsnearthecoast。Icannotgiveamoreforcibleproofoftheirnumbers,thanbystatingthatwhenwewereleftatJamesIsland,wecouldnotforsometimefindaspotfreefromtheirburrowsonwhichtopitchoursingletent。Liketheirbrothersthesea-kind,theyareuglyanimals,ofayellowishorangebeneath,andofabrownishredcolourabove:fromtheirlowfacialangletheyhaveasingularlystupidappearance。Theyare,perhaps,ofaratherlesssizethanthemarinespecies;butseveralofthemweighedbetweentenandfifteenpounds。Intheirmovementstheyarelazyandhalftorpid。Whennotfrightened,theyslowlycrawlalongwiththeirtailsandbelliesdraggingontheground。
Theyoftenstop,anddozeforaminuteortwo,withclosedeyesandhindlegsspreadoutontheparchedsoil。
Theyinhabitburrows,whichtheysometimesmakebetweenfragmentsoflava,butmoregenerallyonlevelpatchesofthesoftsandstone-liketuff。
Theholesdonotappeartobeverydeep,andtheyenterthegroundatasmallangle;sothatwhenwalkingovertheselizard-warrens,thesoilisconstantlygivingway,muchtotheannoyanceofthetiredwalker。Thisanimal,whenmakingitsburrow,worksalternatelytheoppositesidesofitsbody。Onefrontlegforashorttimescratchesupthesoil,andthrowsittowardsthehindfoot,whichiswellplacedsoastoheaveitbeyondthemouthofthehole。Thatsideofthebodybeingtired,theothertakesupthetask,andsoonalternately。Iwatchedoneforalongtime,tillhalfitsbodywasburied;Ithenwalkedupandpulleditbythetail,atthisitwasgreatlyastonished,andsoonshuffleduptoseewhatwasthematter;andthenstaredmeintheface,asmuchastosay,“Whatmadeyoupullmytail?”
Theyfeedbyday,anddonotwanderfarfromtheirburrows;iffrightened,theyrushtothemwithamostawkwardgait。Exceptwhenrunningdownhill,theycannotmoveveryfast,apparentlyfromthelateralpositionoftheirlegs。Theyarenotatalltimorous:whenattentivelywatchinganyone,theycurltheirtails,and,raisingthemselvesontheirfrontlegs,nodtheirheadsvertically,withaquickmovement,andtrytolookveryfierce;
butinrealitytheyarenotatallso:ifonejuststampsontheground,downgotheirtails,andofftheyshuffleasquicklyastheycan。Ihavefrequentlyobservedsmallfly-eatinglizards,whenwatchinganything,nodtheirheadsinpreciselythesamemanner;butIdonotatallknowforwhatpurpose。IfthisAmblyrhynchusisheldandplaguedwithastick,itwillbiteitveryseverely;butIcaughtmanybythetail,andtheynevertriedtobiteme。Iftwoareplacedonthegroundandheldtogether,theywillfight,andbiteeachothertillbloodisdrawn。
Theindividuals,andtheyarethegreaternumber,whichinhabitthelowercountry,canscarcelytasteadropofwaterthroughouttheyear;
buttheyconsumemuchofthesucculentcactus,thebranchesofwhichareoccasionallybrokenoffbythewind。Iseveraltimesthrewapiecetotwoorthreeofthemwhentogether;anditwasamusingenoughtoseethemtryingtoseizeandcarryitawayintheirmouths,likesomanyhungrydogswithabone。Theyeatverydeliberately,butdonotchewtheirfood。Thelittlebirdsareawarehowharmlessthesecreaturesare:Ihaveseenoneofthethick-billedfinchespickingatoneendofapieceofcactuswhichismuchrelishedbyalltheanimalsofthelowerregion,whilstalizardwaseatingattheotherend;andafterwardsthelittlebirdwiththeutmostindifferencehoppedonthebackofthereptile。
Iopenedthestomachsofseveral,andfoundthemfullofvegetablefibresandleavesofdifferenttrees,especiallyofanacacia。Intheupperregiontheylivechieflyontheacidandastringentberriesoftheguayavita,underwhichtreesIhaveseentheselizardsandthehugetortoisesfeedingtogether。Toobtaintheacacia-leavestheycrawlupthelowstuntedtrees;
anditisnotuncommontoseeapairquietlybrowsing,whilstseatedonabranchseveralfeetabovetheground。Theselizards,whencooked,yieldawhitemeat,whichislikedbythosewhosestomachssoaraboveallprejudices。
HumboldthasremarkedthatinintertropicalSouthAmerica,alllizardswhichinhabitdryregionsareesteemeddelicaciesforthetable。Theinhabitantsstatethatthosewhichinhabittheupperdamppartsdrinkwater,butthattheothersdonot,likethetortoises,travelupforitfromthelowersterilecountry。Atthetimeofourvisit,thefemaleshadwithintheirbodiesnumerous,large,elongatedeggs,whichtheylayintheirburrows:
theinhabitantsseekthemforfood。