PAL

Ptolemaeus Arabus et Latinus

_ (the underscore) is the placeholder for exactly one character.
% (the percent sign) is the placeholder for no, one or more than one character.
%% (two percent signs) is the placeholder for no, one or more than one character, but not for blank space (so that a search ends at word boundaries).

At the beginning and at the end, these placeholders are superfluous.

northern limit ‘northern limit’

English

References: PH Hamm: I.3:6, 47:7; I.9:4, 51:16
Translation of:
Greek: βόρειον πέρας [PH Heiberg: I.3:6, 74:22; I.9:4, 82:16]