Poṇika
Poṇika,(adj.) [fr.poṇa2] that which is prone,going prone; DA.I,23 where the passage is “tiracchāna-gata-pāṇāpoṇika-nikāyo cikkhallika-nikāyo ti,” quoted from S.III,152,where it runs thus:“tiracchāna-gata pāṇā te pi bhikkhave tiracchānagatā pāṇā citten’eva cittatā.” The passage is referred to with poṇika at KhA 12,where we read “tiracchāna-gatā pāṇā poṇika-nikāyo cikkhallika-nikāyo ti.” Thus we may take poṇikanikāya as “the kingdom of those which go prone” (i.e.the animals).(Page 474)