Add the post excerpt into a hover over box

I’ve been trying to add a title and excerpt that will appear when the mouse hovers over a thumbnail. The title appears fine, but I’m having trouble adding the excerpt. For some reason it appears below the thumbnail and I have no idea why.

The code I’m using is::

<div class="imgteaser">
<a href="<?php the_permalink(); ?>"><?php the_post_thumbnail('feature');?>
	<!--span class="more">&raquo; More</span-->
		<span class="desc">
			<strong> <?php the_title(); the_excerpt() ?> </strong>

My website address is https://www.songanddanse.com/dev

Thank you! Any help would be appreciated. Ben.