If you haven't already picked it up, you'll notice that Mythologies (the readings for this week) is a difficult text. You will need to read it very carefully and will likely need to do some research to make sure your clear on some of the semiotic principles Barthes discusses.
That said, in addition to reading the Barthes, I'm including the url of a very good lecture below which gives some historical context and expands upon some of Barthes ideas.
http://seacoast.sunderland.ac.uk/~os0tmc/myth.htm
Take your time with this text--it can be very rewarding if it is read carefully. You will have great insight into the picture below if you do!