▁individual ▁to ▁the ▁next . ▁ ▁This ▁animal ▁can ▁grow ▁to ▁be ▁as ▁large ▁as ▁ 2 0 0   mm , ▁or ▁nearly ▁ 8 ▁inches ▁in ▁length . ▁ ▁References ▁ ▁External ▁links ▁ ▁Be hr ens ▁D . W ., ▁ 1 9 8 0 , ▁Pacific ▁Coast ▁N ud ib ranch s : ▁a ▁guide ▁to ▁the ▁op is th ob ranch s ▁of ▁the ▁n ort he astern ▁Pacific , ▁Sea ▁Ch allen ger ▁Books , ▁Washington ▁▁ ▁Day rat ▁B . ▁ 2 0 1 0 . ▁A ▁mon ographic ▁revision ▁of ▁disc odor id ▁sea ▁sl ugs ▁( G ast rop oda , ▁O pis th ob ranch ia , ▁N ud ib ranch ia , ▁Dor id ina ). ▁Pro ceed ings ▁of ▁the ▁California ▁Academy ▁of ▁Sciences , ▁Series ▁ 4 , ▁vol . ▁ 6 1 , ▁supp l . ▁I , ▁ 1 - 4 0 3 , ▁ 3 8 2 ▁fig s . ▁ ▁Sea ▁Sl ug ▁Forum , ▁species ▁fact ▁sheet : ▁▁ ▁Sl ug ▁Site : ▁▁ ▁Category : Dis c odor id idae ▁Category : G ast rop ods ▁described ▁in ▁ 1 9 0 5 <0x0A> </s> ▁The ▁silver ▁center ▁cent ▁is ▁an ▁American ▁pattern ▁coin , ▁one ▁of ▁the ▁prec urs ors ▁to ▁the ▁large ▁cent ▁and ▁an ▁early ▁example ▁of ▁a ▁b imet all ic ▁coin . ▁Less ▁than ▁a ▁dozen ▁spec im ens ▁are ▁known ▁to ▁exist ▁today , ▁and ▁they ▁generally ▁fetch