le ▁which ▁at ▁the ▁edge ▁gr ades ▁into ▁op aque ▁white , ▁then ▁light ▁pur ple ▁with ▁el ong ated ▁dark ▁pur ple ▁sp ots ▁and ▁finally ▁an ▁orange ▁margin . ▁The ▁middle ▁of ▁the ▁back ▁has ▁raised ▁white ▁t uber cles ▁which ▁are ▁somewhat ▁cluster ed ▁into ▁groups . ▁The ▁g ill ▁and ▁r hin op hor es ▁are ▁marked ▁with ▁op aque ▁white . ▁The ▁length ▁of ▁the ▁body ▁var ies ▁between ▁ 2 5   mm ▁and ▁ 3 5   mm . ▁There ▁are ▁a ▁number ▁of ▁species ▁with ▁similar ▁colour ▁patterns . ▁ ▁References ▁ ▁Category : Ch rom odor id idae ▁Category : G ast rop ods ▁described ▁in ▁ 1 9 9 4 <0x0A> </s> ▁Maur its ▁Ad ria an ▁de ▁Sav orn in ▁L oh man ▁( 9 ▁January ▁ 1 8 3 2 ▁— ▁ 1 2 ▁July ▁ 1 8 9 9 ) ▁was ▁the ▁Dutch ▁Governor ▁of ▁Sur in am ▁from ▁ 1 8 8 9 ▁to ▁ 1 8 9 1 . ▁ ▁De ▁Sav orn in ▁L oh man ▁studied ▁Roman ▁and ▁contemporary ▁law ▁( Ph D ▁on ▁propos itions ) ▁from ▁ 1 8 5 0 ▁to ▁ 1 8 5 5 ▁at ▁the ▁Hog esch ool ▁in ▁G ron ingen . ▁ ▁From ▁ 1 8 6 1 ▁to ▁ 1 8 7 0 ▁he ▁was ▁deput y ▁pro sec utor ▁in ▁Ass en , ▁then ▁until ▁ 1 8 8 6 ▁pro sec utor . ▁In ▁