Bosporius, an intimate friend of Basil and of Gregory of Nazianzus, was bishop of Colonia, in Cappadocia Secunda.  Basil left Cæsarea in 360 in distress at hearing that Dianius had subscribed the creed of Ariminum, but was hurt at the charge that he had anathematized his friend and bishop.  Dianius died in Basil’s arms in 362.