▁The ▁for cip ules ▁arise ▁from ▁the ▁first ▁body ▁segment , ▁cur ving ▁forward ▁and ▁to ▁the ▁mid line . ▁ ▁The ▁tip ▁is ▁a ▁pointed ▁f ang , ▁which ▁has ▁an ▁opening ▁from ▁a ▁ven om ▁g land . ▁ ▁The ▁for cip ules ▁are ▁used ▁to ▁capture ▁and ▁en ven om ate ▁pre y . ▁ ▁Cr ust ace ans ▁Cr ust ace ans ▁compr ise ▁a ▁number ▁of ▁classes , ▁with ▁various ▁feed ing ▁modes ▁supported ▁by ▁a ▁range ▁of ▁ad a ptions ▁to ▁the ▁mouth parts . ▁ ▁In ▁general , ▁however , ▁cr ust ace ans ▁possess ▁pa ired ▁mand ibles ▁with ▁oppos ing ▁bit ing ▁and ▁gr inding ▁surfaces . ▁ ▁The ▁mand ibles ▁are ▁followed ▁by ▁pa ired ▁first ▁and ▁second ▁max illa e . ▁ ▁Both ▁the ▁mand ibles ▁and ▁the ▁max illa e ▁have ▁been ▁various ly ▁modified ▁in ▁different ▁cr ust ace an ▁groups ▁for ▁filter ▁feed ing ▁with ▁the ▁use ▁of ▁set ae . ▁ ▁Max ill ip eds ▁Up ▁to ▁the ▁first ▁three ▁pairs ▁of ▁legs ▁are ▁modified ▁to ▁max ill ip eds , ▁which ▁assist ▁manip ulation ▁of ▁food ▁items ▁by ▁passing ▁food ▁forward ▁to ▁the ▁mand ibles ▁for ▁che wing ▁or ▁to ▁the ▁max illa e ▁for ▁cutting ▁into ▁smaller ▁pieces . ▁ ▁S eta e ▁Filter ▁feed ing ▁cr ust ace ans ▁have ▁set ae ▁on ▁modified ▁append ages ▁that ▁act ▁as ▁filters . ▁ ▁Filter ▁feed ing ▁may ▁have ▁developed ▁in ▁association ▁with ▁sw imming , ▁with