Annotatio I §.III (y): Baptismal definitives — signata of the sign; metonymy or synecdoche
(y) In some baptismal definitives — Baptism is putting on Christ (Gal. 3:27); it is the appeal of a good conscience toward God (1 Pet. 3) — the Spirit predicates only Baptism’s signified things of the sign.
Whether the sign is bare external baptism or the whole exhibitive rite, the predication is metonymic or synechdochic; that cannot be denied.
Latin
Quando (y) in definitivis Baptismatis nonnullis: Baptisma est indutio Christi Gal. 3. 27. item, est ἐπερώτημα συνειδήσεως ἀγαθῆς εἰς Θεόν 1. Petr. 3. Spiritus S. sola Baptismatis Signata, de Signo, sive nudo, i. e. baptismate externo, sive exhibitivo, i. e. de integro baptismo, ex interna & externa parte constante, praedicat, negari nequit, vel Metonymicam vel Synechdochicam praedicationem fieri.