[2] Peritónis ‘Periron’: This reading agrees with that of ms. R of the First Variant Version, viz. Peritonis for majority Perironis (Wright 1988, 105), but may be a case of coincident error, given that confusion of <r> and <t> is frequent. The form Perítónis is a Latin gen. (cf. léónis in I 57/7), and Gunnlaugr seems to have taken it over as a gen. of definition specifying the river denoted generically by the common noun ár (gen. case).