ROS msg get seqence number || pointer adress allways added

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Hi I have a problem with ROS and messages especially.

void recievedGoals_callback(const boost::shared_ptr<nav_msgs::Path const>& msg)
      {
               std::cerr << "header seq   " << msg->header.seq << std::cerr;
       }

The return of this is something like "header seq 150x6297a8" and not the sequence-number i published (15)

Why? - Why is a pointer-adress added? How can I get rid of this adress?

The subscriber is:

ros::Subscriber sub_PathToGoal = n.subscribe<nav_msgs::Path>("/Exp/Goal", 1, boost::bind(recievedGoals_callback, _1), ros::VoidConstPtr(),ros::TransportHints().tcpNoDelay());

Thanks