Mongoose distinct query with regex and a limit?

I'm running the following code which returns many results. I want to limit the results to the first 10 docs. How can I add a "limit" to the following mongoose query?

var reg = new RegExp('^'+id,'i');

models.examples.distinct('myId', {myId: reg}, function(err, docs) {
  console.log("docs: " + util.inspect(docs));
  res.send(docs);
});