<i>Baculites</i> specimen in the field; Upper Cretaceous, western South Dakota. Note the tiny fecal pellets in the matrix between the septa on the left end.
<a href="//commons.wikimedia.org/wiki/User:Wilson44691" title="User:Wilson44691">Wilson44691</a>
<span class="int-own-work" lang="en">Own work</span>