Function Reference/fetch rss

I am using the following Function Reference/fetch rss found in the codex. It works fine, right out of the box. I would like to limit the amount of entries it displays, does anybody know how to do that?

<?php require_once(ABSPATH . WPINC . '/rss.php'); ?>
<?php $rss = fetch_rss('http://example.com/rss/feed/goes/here'); ?>
<ul>
<?php foreach ( $rss->items as $item ) : ?>
<li><a href='<?php echo $item['link']; ?>'
title='<?php echo $item['title']; ?>'>
<?php echo $item['title']; ?>
</a></li>
<?php endforeach; ?>
</ul>