4 6 ), ▁American ▁politician ▁William ▁A . ▁R iner ▁( 1 8 7 8 - 1 9 5 5 ), ▁American ▁judge <0x0A> </s> ▁Max act e on ▁han co cki ▁is ▁a ▁species ▁of ▁small ▁sea ▁sn ail , ▁a ▁marine ▁op is th ob ranch ▁g ast rop od ▁m oll usk ▁in ▁the ▁family ▁Act e on idae , ▁the ▁bar rel ▁b ubble ▁sn ails . ▁ ▁Description ▁The ▁length ▁of ▁the ▁shell ▁att ains ▁ 6   mm . ▁It ▁has ▁a ▁head sh ield ▁with ▁a ▁pair ▁of ▁f les hy ▁lo bes ; ▁thin ▁oper cul um . ▁The ▁white ▁shell ▁shows ▁orange - b rown ▁mark ings ▁at ▁the ▁base ▁and ▁at ▁the ▁a pe x . ▁It ▁contains ▁a ▁ ▁large ▁body ▁wh or l . ▁The ▁large ▁col um ella ▁is ▁slightly ▁tw isted . ▁The ▁shell ▁is ▁sculpt ured ▁with ▁gro ov es ▁ ▁Distribution ▁This ▁species ▁is ▁found ▁in ▁moder ately ▁deep ▁water ▁off ▁the ▁northern ▁coast ▁of ▁North ▁Island , ▁New ▁Zealand . ▁ ▁External ▁links ▁ ▁Sp encer ▁H . G ., ▁Will an ▁R . C ., ▁Marshall ▁B . A . ▁& ▁Murray ▁T . J . ▁( 2 0 1 1 ). ▁Check list ▁of ▁the ▁Rec ent ▁M oll us ca ▁Record ed ▁from ▁the ▁New ▁Zealand ▁Ex clus ive ▁Econom ic ▁Zone ▁ ▁References ▁▁ ▁Pow ell ▁A ▁W ▁B , ▁William ▁Collins ▁Publish ers ▁Ltd , ▁A uck land ▁ 1 9