Drawing of the shell of <i>Cittarium pica</i> (L. 1758), by George Washington Tryon Jr (1889).
Tryon, G. W.
1889
<a rel="nofollow" class="external text" href="https://www.biodiversitylibrary.org/item/41496#639">Manual of conchology, structural and systematic: with illustrations of the species / by George W. Tryon, Jr. VOL XI</a>