. ▁The ▁very ▁minute , ▁white , ▁h yal ine ▁shell ▁consists ▁of ▁four ▁wh or ls , ▁including ▁the ▁smooth , ▁glob ular ▁proto con ch . ▁It ▁has ▁a ▁disco idal ▁shape ▁with ▁a ▁sun ken ▁sp ire ▁and ▁is ▁widely ▁um bil ic ated . ▁It ▁is ▁orn ament ed ▁with ▁trans verse ▁r ible ts . ▁On ▁the ▁body ▁wh or l ▁they ▁number ▁about ▁ 2 7 . ▁They ▁are ▁irregular ly ▁spac ed , ▁becoming ▁more ▁crow ded ▁towards ▁the ▁a pert ure . ▁The ▁interven ing ▁spaces ▁are ▁travers ed ▁by ▁very ▁fine , ▁enc ir cling ▁inc ised ▁lines . ▁The ▁a pert ure ▁is ▁circular . ▁ ▁Distribution ▁This ▁marine ▁species ▁is ▁en demic ▁to ▁Australia ▁and ▁occurs ▁off ▁New ▁South ▁Wales ▁and ▁Victoria . ▁ ▁External ▁links ▁ ▁Natural ▁History ▁Museum ▁Rot ter dam : ▁Li ot ella ▁kil c und ae ▁ ▁Se ash ells ▁of ▁New ▁South ▁Wales : ▁Li ot ella ▁kil c und ae ▁ ▁References ▁▁ ▁I red ale , ▁T . ▁& ▁Mc Michael , ▁D . F . ▁( 1 9 6 2 ). ▁A ▁reference ▁list ▁of ▁the ▁marine ▁M oll us ca ▁of ▁New ▁South ▁Wales . ▁Mem oir s ▁of ▁the ▁Australian ▁Museum . ▁ 1 1 ▁: ▁ 1 - 1 0 9 ▁ ▁kil c und ae ▁Category : G ast rop ods ▁of ▁Australia ▁Category : G ast rop ods ▁described ▁in ▁ 1 9 1 4 <0x0A> </s> ▁L