Antalis vulgaris (da Costa, 1778) ; Dentaliidae; a) the shell b) the animal removed from the shell  f) the foot
British Museum
1901
<a rel="nofollow" class="external text" href="https://www.biodiversitylibrary.org/item/112021age/24/mode/1up">A Guide to the shell and starfish galleries of the British Museum p.28</a>