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Inthecaseofanimalsthatarequadrupedsandred-bloodedandoviparous，generationtakesplaceinthespring，butcopulationdoesnottakeplaceinanuniformseason。Insomecasesittakesplaceinthespring，inothersinsummertime，andinothersintheautumn，accordingasthesubsequentseasonmaybefavourablefortheyoung。
Thetortoiselayseggswithahardshellandoftwocolourswithin，likebirds\'eggs，andafterlayingthemburiestheminthegroundandtreadsthegroundhardoverthem；itthenbroodsovertheeggsonthesurfaceoftheground，andhatchestheeggsthenextyear。
Thehemys，orfresh-watertortoise，leavesthewaterandlaysitseggs。Itdigsaholeofacasklikeshape，anddepositsthereintheeggs；afterratherlessthanthirtydaysitdigstheeggsupagainandhatchesthemwithgreatrapidity，andleadsitsyoungatonceofftothewater。Thesea-turtlelaysonthegroundeggsjustliketheeggsofdomesticatedbirds，buriestheeggsintheground，andbroodsovertheminthenight-time。Itlaysaverygreatnumberofeggs，amountingattimestoonehundred。
Lizardsandcrocodiles，terrestrialandfluvial，layeggsonland。