▁of ▁the ▁Environment , ▁Water , ▁Heritage ▁and ▁the ▁Arts . ▁ ▁See ▁also ▁U ran ium ▁min ing ▁in ▁Australia ▁U ran ium ▁min ing ▁in ▁K ak adu ▁National ▁Park ▁ ▁References ▁ ▁External ▁links ▁Environment ▁Prote ction ▁( All ig ator ▁R ivers ▁Region ) ▁Act ▁ 1 9 7 8 ▁Super vis ing ▁Scient ist ▁annual ▁reports ▁ ▁Category : Common wealth ▁Government ▁ag encies ▁of ▁Australia ▁Category : Environment ▁of ▁Australia ▁Category : Radio active ▁waste ▁Category : U ran ium ▁min ing ▁in ▁Australia <0x0A> </s> ▁The ▁contra h entes ▁( sing ular ▁contra hens ) ▁are ▁mus cles ▁widely ▁present ▁in ▁the ▁hands ▁of ▁m amm als , ▁including ▁mon keys . ▁They ▁are ▁on ▁the ▁pal mar / plant ar ▁side . ▁There ▁is ▁one ▁each ▁for ▁digits ▁I , ▁II , ▁IV ▁and ▁V , ▁but ▁not ▁III . ▁They ▁pull ▁the ▁fingers / to es ▁down ▁and ▁together . ▁ ▁Human ▁an atom y ▁In ▁humans , ▁the ▁ad duct or ▁pol lic is ▁mus cle ▁in ▁the ▁hand ▁and ▁the ▁ad duct or ▁hall uc is ▁in ▁the ▁foot ▁are ▁well - develop ed ▁rem n ants ▁of ▁the ▁first ▁contra hens , ▁though ▁they ▁have ▁lost ▁the ▁insert ion ▁on ▁the ▁dist al ▁ph al an x ▁of ▁the ▁thumb ▁or ▁big ▁toe . ▁ ▁The ▁other ▁contra h entes ▁only ▁appear ▁as ▁rare ▁at av istic ▁ab normal ities . ▁ ▁In ▁other ▁m amm als , ▁the ▁contra h