, ▁grad ate , ▁strik ingly ▁painted , ▁spir ally ▁l ir ate . ▁The ▁del icate ▁li ra e ▁number ▁about ▁ 1 2 ▁on ▁the ▁pen ult imate ▁wh or l . ▁The ▁body ▁wh or l ▁is ▁dil ated , ▁bi angular , ▁orn ament ed ▁with ▁trans verse ▁white ▁and ▁re dd ish - v io let ▁interrupted ▁lines , ▁like ▁flex uous ▁ray s . ▁At ▁the ▁s uture ▁and ▁peri ph ery , ▁there ▁are ▁zones ▁formed ▁of ▁vio let - b rown ▁sp ots ▁altern ating ▁with ▁white ▁or ▁yellow ish ▁ones . ▁The ▁base ▁of ▁the ▁shell ▁is ▁convex , ▁with ▁ 1 5 ▁to ▁ 1 6 ▁concent ric ▁li ra e . ▁The ▁color ation ▁is ▁white ▁and ▁re dd ish ▁t ess ell ated . ▁The ▁a pert ure ▁sub ov ate ▁and ▁has ▁thin ▁marg ins . ▁The ▁col um ella ▁is ▁ar cu ate , ▁sub n od ose ▁inside ▁below . ▁The ▁white ▁um bil ical ▁tract ▁is ▁fun nel - sh aped . ▁ ▁Distribution ▁This ▁marine ▁species ▁is ▁en demic ▁to ▁Australia ▁and ▁occurs ▁off ▁New ▁South ▁Wales , ▁South ▁Australia , ▁Tas mania , ▁Victoria ▁and ▁Western ▁Australia ▁ ▁References ▁▁ ▁Men ke , ▁C . T . ▁ 1 8 4 3 . ▁M oll us cor um ▁Nov ae ▁Holland iae ▁Spec imen ▁in ▁L ibr aria ▁A ul ica ▁H ahn iana . ▁Hannover ae ▁: ▁L ibr aria ▁A ul ica ▁H