Anupariveṇiyaṃ [anu + pariveṇiyaṃ = locative of pariveṇi] should be written anu pariveṇiyaṃ ("in every cell, cell by cell"), anu here functioning as preposition with locative (see anu A) Vin I 80, 106.
(ind, ind, adv, acc of anupariveṇiya) from section to section; from apartment to apartment Construction: anu + pari + veṇī + iya + aṃ anupariveṇiya + aṃ