Sentence:  1.4.3 Also on the board, but turned face down at the beginning of the game, are <WSD>chits</WSD> representing treasure sites and sounds and warnings of monsters that may arrive on the map. When characters end a turn in the hex, these <WSD>chits</WSD> are revealed. As characters move around the board, more and more of these <WSD>chits</WSD> will be revealed, letting the players know where monsters and treasures are to be found. 
Meaning of the word marked with <WSD> tags:  A smaller cardboard counter generally used not to directly represent something but for another, more transient, purpose such as tracking or randomization.