▁similar ▁mas quer ading ▁culture ▁and ▁these ▁mas quer ades ▁( egung un ▁or ▁eg un ) ▁are ▁said ▁to ▁represent ▁an central ▁spirits . ▁Although ▁there ▁are ▁mas quer ades ▁such ▁as ▁the ▁E pa ▁mas qu erade ▁that ▁are ▁similar ▁to ▁those ▁found ▁among ▁other ▁Y or uba ▁groups , ▁In a - oko , ▁On ig ab on , ▁O una ▁and ▁the ▁lik es ▁of ▁other ▁mas quer ades ▁that ▁are ▁u bi quit ous ▁in ▁Ok un ▁land ▁are ▁not ▁found ▁among ▁the ▁other ▁Y or uba ▁groups ▁but ▁rather ▁found ▁to ▁be ▁similar ▁to ▁those ▁of ▁some ▁non - Ok un ▁inhabitants ▁of ▁the ▁Niger - Ben ue ▁confl u ence ▁like ▁the ▁Bass a ▁N ges . ▁While ▁the ▁eg ung un ▁cult ▁groups ▁are ▁almost ▁exclusive ▁for ▁men , ▁women ▁also ▁had ▁their ▁own ▁group ▁called ▁of osi ▁( oh osi ▁in ▁O w oro ). ▁Of osi ▁women ▁spoke ▁a ▁language ▁that ▁was ▁not ▁intellig ible ▁locally ▁and ▁were ▁believed ▁to ▁be ▁able ▁to ▁call ▁people ▁home ▁from ▁whatever ▁location ▁by ▁myst ical ▁means . ▁ ▁Until ▁the ▁advent ▁of ▁the ▁N up es ▁in ▁the ▁ 1 9 th ▁century , ▁each ▁of ▁the ▁Ok un ▁sub groups ▁lack ed ▁any ▁form ▁of ▁central ▁government ▁but ▁were ▁organ ised ▁into ▁small ▁city ▁states . ▁Each ▁' state ' ▁was ▁govern ed ▁by ▁leadership ▁rot ated ▁amongst ▁the ▁constitu ent ▁line ages ▁or ▁cl ans . ▁The ▁central ▁king ship ▁system ▁has ▁led ▁to