<p>Plate 24: Middle Cambrian Crustaceans (<i>Neolenus, Ptychoparia, Mollisonia</i>, and <i>Tontoia</i>)
</p>
<dl><dd>1. <i>Neolenus serratus</i> <small>(Rominger)</small> =</dd>
<dd>1a. <i>Neolenus serratus</i> <small>(Rominger)</small> =</dd>
<dd>2. <i>Ptychoparia cordilleræ</i> <small>(Rominger)</small> =</dd>
<dd>3. <i>Mollisonia symmetrica</i> <small>Walcott</small> =</dd>
<dd>4. <i>Tontoia kwaguntensis</i> <small>Walcott</small> =</dd>
<dd>5. <i>Mollisonia gracilis</i> <small>Walcott</small> =</dd>
<dd>6. <i>Mollisonia ? rara</i> <small>Walcott</small> =</dd>
<dd>7. <i>Mollisonia ? rara</i> <small>Walcott</small> =</dd></dl>
<bdi><a href="https://en.wikipedia.org/wiki/en:Charles_Doolittle_Walcott" class="extiw" title="w:en:Charles Doolittle Walcott"><span title="American paleontologist and 4th Secretary of the Smithsonian (1850-1927)">Charles Doolittle Walcott</span></a>
</bdi>
1912
Charles D. Walcott: <a href="https://en.wikisource.org/wiki/Cambrian_Geology_and_Paleontology/Volume_2/Middle_Cambrian_Branchiopoda,_Malacostraca,_Trilobita,_and_Merostomata" class="extiw" title="s:Cambrian Geology and Paleontology/Volume 2/Middle Cambrian Branchiopoda, Malacostraca, Trilobita, and Merostomata">Middle Cambrian Branchiopoda, Malacostraca, Trilobita, and Merostomata</a>. <i>Smithsonian Miscellaneous Collections</i>, Volume 57, Number 6 (Publication 2051), City of Washington, Published by the Smithsonian Institution, March 13, 1912.