▁line ages ▁often ▁called ▁bo as , ▁mostly ▁now ▁considered ▁sub famil ies ▁of ▁Bo idae ]), ▁and ▁Bol yer i idae ▁– ▁Round ▁Island ▁split j aw ▁sn akes . ▁ ▁Because ▁these ▁sn akes ▁do ▁not ▁form ▁a ▁mon oph y let ic ▁group ▁they ▁can ▁no ▁longer ▁be ▁formally ▁referred ▁to ▁using ▁a ▁single ▁name . ▁In ▁modern ▁usage , ▁" Hen oph idia " ▁is ▁often ▁placed ▁in ▁quotes , ▁because ▁it ▁can ▁be ▁convenient ▁to ▁refer ▁to ▁all ▁line ages ▁that ▁used ▁to ▁be ▁considered ▁Hen oph idia . ▁Another ▁way ▁of ▁thinking ▁about ▁it ▁is ▁that ▁" hen oph id ian " ▁sn akes ▁are ▁all ▁sn akes ▁that ▁are ▁not ▁S cole c oph idia ▁( bl inds n akes ) ▁or ▁Ca en oph idia ▁( so - called ▁" ad vanced ▁sn akes "). ▁" Hen oph id ian " ▁sn akes ▁are ▁sometimes ▁said ▁to ▁be ▁more ▁" bas al " ▁or ▁" prim itive " ▁than ▁those ▁belonging ▁to ▁the ▁Ca en oph idia , ▁but ▁this ▁does ▁not ▁mean ▁that ▁they ▁are ▁inferior ▁or ▁that ▁they ▁have ▁evol ved ▁less , ▁rather ▁that ▁we ▁think ▁they ▁share ▁more ▁tra its ▁with ▁their ▁common ▁ancest or ▁in ▁comparison ▁to ▁the ▁Ca en oph idia . ▁ ▁Et ym ology ▁Hen oph idia ▁comes ▁from ▁the ▁Greek ▁h eno - ▁meaning ▁one ▁or ▁former ▁and ▁o ph idia ▁meaning ▁ser pent , ▁so ▁former / older ▁sn akes ▁( in ▁contrast ▁to ▁Ca