We reproduce the four horizontal dashes written in FED, perhaps by Chopin, as wedges, since the Chopinesque wedges generally look like that in the autographs. However, it seems to be unlikely that Chopin would actually mean staccato in this place (not to mention staccatissimo). These marks are most probably to be interpreted together with the slur, as an indication of the portato articulation, close to the one the composer would usually mark with dots under a slur, e.g. in bar 231.
Compare the passage in the sources»
category imprint: Differences between sources
issues: Annotations in teaching copies, Annotations in FED
notation: Articulation, Accents, Hairpins