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Name of Cap Matifou, which encloses the Bay of Algiers in the northeast, and the Punic base near the cape, modern Tamentfoust. [1. 379] explains the name with Rš-gnj = 'Cap du Francolin'. Evidence: Ruthisia (?), Mela 1,31; colonia Augusti R., Plin. HN 5,20; Ῥουστόνιον/Rhoustónion, Ptol. 4,2,6; R. colonia, It. Ant. 16,1; Rusgume, Geogr. Rav. 40,43; Rugunie, Geogr. Rav. 88,13; Rusgimia, Guido, Geographia 132,22. R. became a colonia through deductio of legio IX Gemella before AD 27 [2]. Inscriptions: CIL VIII…