How many of each type of path cards are there in Saboteur?
You are not missing any.

As you can see, the treasure card ("la carte Arrivée avec le trésor") and the rock cards ("les cartes Arrivée avec des pierres") and the starting card ("carte de départ") are not listed in the contents. There are 40 "normal" path cards, or 44 when you include those four.