▁Official ▁Website ▁of ▁the ▁original ▁production ▁at ▁the ▁C ott es lo e ▁Theatre , ▁Royal ▁National ▁Theatre ▁( NT ) ▁ ▁Category : 2 0 0 0 ▁plays ▁Category : Pl ays ▁by ▁Harold ▁P inter ▁Category : B rit ish ▁plays ▁Category : Fil ms ▁with ▁screen plays ▁by ▁Harold ▁P inter ▁Category : Pl ays ▁based ▁on ▁works ▁by ▁Marcel ▁Pr oust <0x0A> </s> ▁Pro th al ot ia ▁les ue uri , ▁common ▁name ▁Les ue ur ' s ▁top ▁shell , ▁is ▁a ▁species ▁of ▁sea ▁sn ail , ▁a ▁marine ▁g ast rop od ▁m oll usk ▁in ▁the ▁family ▁Tro ch idae , ▁the ▁top ▁sn ails . ▁ ▁Description ▁The ▁height ▁of ▁the ▁shell ▁var ies ▁between ▁ 1 3   mm ▁and ▁ 1 9   mm , ▁its ▁diameter ▁between ▁ 1 0   mm ▁and ▁ 1 1   mm . ▁The ▁somewhat ▁solid , ▁imper for ate ▁shell ▁has ▁an ▁el ong ated ▁con ical ▁shape . ▁It ▁is ▁wh it ish ▁or ▁a ▁little ▁t ing ed ▁with ▁o live , ▁painted ▁with ▁numerous ▁rather ▁narrow ▁longitud inal ▁o live - b rown ▁or ▁re dd ish - b rown ▁stri pes ▁generally ▁broken ▁into ▁t ess ell ations ▁on ▁the ▁base . ▁The ▁sp ire ▁is ▁long . ▁The ▁wh it ish ▁a pe x ▁is ▁sub ac ute . ▁The ▁s ut ures ▁are ▁moder ately ▁im pressed . ▁The ▁about ▁ 7 ▁wh or ls ▁are ▁flat