Risso explains that this species is the real glaucus of Artedi. In any case, the description fits much better with the current Prionace glauca (Linnaeus, 1758) than with Carcharodon carcharias (Linnaeus, 1758).
Etymology of Generic name :
Genus name from Latin 'squalus' meaning shark (Ref. 6885, 27436).
Latin, squalidus = pale, weak (Ref. 45335).