is a name which Solinus (100.25
, ed. Steph.) gives to the straits which separate Gallia and Britannia. Tacitus (Agric.
100.40) calls it “Fretum Oceani.” It is the πορθμὸς Βρετανικός
of Strabo (p. 128). Thus, in ancient times, both the countries which it separates gave this narrow sea a name; and it has no general name, for the English call it the Straits of Dover, and the French sometimes Pas de Calais.