Book V concerns itself with the Ophite heresies. It has also been called and marketed as "ophicalcite" or "ophite". He details what has been identified by subsequent writers as an Ophite cosmogony. The name Ennoea is similarly used in the Ophite system described by Irenaeus (). The Naassenes (from Hebrew "na'asch", snake) were a Gnostic Ophite sect.