So the word mark means not only a weight but is also used as a linear measure = 48 alen, and also as a measure of area, as in the term arable mark etc. See Appendix.

Many of the Roman unciae in the British Museum are under 410 grs.

ὁ δὲ νοῦμμος δοκεῖ μὲν εἶναι Ῥωμαίων τοὔνομα τοῦ νομίσματος, ἔστι δὲ Ἑλληνικὸν καὶ τῶν ἐν Ἰταλίᾳ καὶ ἐν Σικελίᾳ Δωριέων.

Pollux IX. 84.

Evans, Horsemen of Tarentum, pp. 9-11.

Tabulae Heracleenses (Boeckh Corp. Inscrip. Graec. 5774-5; Cauer, Delectus 40, 41) I, 122. αἱ δέ κα μὴ πεφυτεύκωντι κατὰ γεγραμμένα, κατεδικέσθεν πὰρ μὲν τὰν ἐλαίαν δέκα νόμως ἀργυρίω πὰρ τὸ φυτὸν ἕκαστον, πὰρ δὲ τὰς ἀμπέλως δύο μνᾶς ἀργυρίω πὰρ τὰν σχοῖνον ἑκάσταν.

Boeckh, Metrol. Unters. 160, takes the Sicilicus as originally the Silician quadrans in the Roman silver reckoning. Cf. Mommsen, Blacas, I, 243. Hultsch, Metrol. p. 145.

Étude des monnaies de l’Italie antique. Première partie, pp. 8 and 16.

Ibid. p. 29.