<p>Plate 54: Trilobita (<i>Holmia</i> and <i>Olenellus</i>) to face page 326
</p>
<ol><li><i>Holmia ? macer</i> <small>(Walcott)</small> = <a href="//commons.wikimedia.org/wiki/File:Mummaspis_macer_USNM_PAL_60092.jpg" title="File:Mummaspis macer USNM PAL 60092.jpg"><i>Mummaspis macer</i> <small>(Walcott, 1913)</small></a></li>
<li><i>Olenellus truemani</i> <small>(Walcott)</small> = <a href="//commons.wikimedia.org/wiki/File:Fritzolenellus_truemani_USNM_PAL_60084.jpg" title="File:Fritzolenellus truemani USNM PAL 60084.jpg"><i>Fritzolenellus truemani</i> <small>(Walcott, 1913)</small></a></li>
<li><i>Olenellus truemani</i> <small>(Walcott)</small> = <a href="//commons.wikimedia.org/wiki/File:Olenellus_cf._truemani_USNM_PAL_60085.jpg" title="File:Olenellus cf. truemani USNM PAL 60085.jpg"><i>Olenellus</i> cf. <i>truemani</i> <small>(Walcott, 1913)</small></a></li>
<li><i>Olenellus truemani</i> <small>(Walcott)</small> = <a href="//commons.wikimedia.org/wiki/File:Olenellus_cf._truemani_USNM_PAL_60086_A.jpg" title="File:Olenellus cf. truemani USNM PAL 60086 A.jpg"><i>Olenellus</i> cf. <i>truemani</i> <small>(Walcott, 1913)</small></a></li>
<li><i>Olenellus truemani</i> <small>(Walcott)</small> = <a href="//commons.wikimedia.org/wiki/File:Olenellus_cf._truemani_USNM_PAL_60086_B.jpg" title="File:Olenellus cf. truemani USNM PAL 60086 B.jpg"><i>Olenellus</i> cf. <i>truemani</i> <small>(Walcott, 1913)</small></a></li>
<li><i>Olenellus truemani</i> <small>(Walcott)</small> = <a href="//commons.wikimedia.org/wiki/File:Fritzolenellus_truemani_USNM_PAL_60087.jpg" title="File:Fritzolenellus truemani USNM PAL 60087.jpg"><i>Fritzolenellus truemani</i> <small>(Walcott, 1913)</small></a></li>
<li><i>Olenellus truemani</i> <small>(Walcott)</small> = <a href="//commons.wikimedia.org/wiki/File:Olenellus_cf._truemani_USNM_PAL_60088.jpg" title="File:Olenellus cf. truemani USNM PAL 60088.jpg"><i>Olenellus</i> cf. <i>truemani</i> <small>(Walcott, 1913)</small></a></li>
<li><i>Olenellus truemani</i> <small>(Walcott)</small> = <a href="//commons.wikimedia.org/wiki/File:Fritzolenellus_truemani_USNM_PAL_60089.jpg" title="File:Fritzolenellus truemani USNM PAL 60089.jpg"><i>Fritzolenellus truemani</i> <small>(Walcott, 1913)</small></a></li>
<li><i>Olenellus truemani</i> <small>(Walcott)</small> = <a href="//commons.wikimedia.org/wiki/File:Olenellus_cf._truemani_USNM_PAL_60090.jpg" title="File:Olenellus cf. truemani USNM PAL 60090.jpg"><i>Olenellus</i> cf. <i>truemani</i> <small>(Walcott, 1913)</small></a></li>
<li><i>Olenellus truemani</i> <small>(Walcott)</small> = <a href="//commons.wikimedia.org/wiki/File:Olenellus_cf._truemani_USNM_PAL_60091.jpg" title="File:Olenellus cf. truemani USNM PAL 60091.jpg"><i>Olenellus</i> cf. <i>truemani</i> <small>(Walcott, 1913)</small></a></li></ol><div style="padding:0.5ex; margin:3ex 0 0.5ex 0; border: 2px solid grey; border-top-style: dotted; min-height:3.5em">
<p><b>Original historic description:</b>
</p>
<center>DESCRIPTION OF PLATE 54</center>
<table width="100%"><tbody><tr><td colspan="3"></td>
<td valign="bottom" align="center"><small>PAGE</small>
</td></tr><tr valign="top"><td colspan="3"><i>Holmia ? macer</i> Walcott</td>
<td align="right">313
</td></tr><tr valign="top"><td width="10px;"></td>
<td>Fig.</td>
<td>1. (× 3.) Type specimen of the species. (From locality 12v.) Lower Cambrian shale, Fruitville, Lancaster County, Pennsylvania. U. S. National Museum, Catalogue No. 60092.
</td></tr><tr valign="top"><td colspan="3"><i>Olenellus truemani</i> Walcott</td>
<td align="right">316
</td></tr><tr valign="top"><td></td>
<td>Fig.</td>
<td>2. (× 2.) Surface of shale with two compressed, nearly entire dorsal shields and a small cephalon. (Locality 61k.) U. S. National Museum, Catalogue No. 60084.
</td></tr><tr valign="top"><td></td>
<td></td>
<td>3. (× 2.) Compressed and slightly distorted hypostoma. (Locality 61k.) U. S. National Museum, Catalogue No. 60085.
</td></tr><tr valign="top"><td></td>
<td></td>
<td>4 and 5. (× 5.) Two small hypostomas. (Locality 61k.) U. S. National Museum, Catalogue No. 60086.
</td></tr><tr valign="top"><td></td>
<td></td>
<td>6. (Natural size.) Cephalon with outer test of cheeks exfoliated so as to show casts of radial canals. (Locality 61k.) U. S. National Museum, Catalogue No. 60087.
</td></tr><tr valign="top"><td></td>
<td></td>
<td>7. (Natural size.) Broad, flattened dorsal shield with enlarged third thoracic segment. (Locality 61k.) U. S. National Museum, Catalogue No. 60088.
</td></tr><tr valign="top"><td></td>
<td></td>
<td>8. (× 2.) A small, almost entire dorsal shield. (Locality 61k.) U. S. National Museum, Catalogue No. 60089.
</td></tr><tr valign="top"><td></td>
<td></td>
<td>9. (× 2.) A small cephalon preserving much of its original convexity. The attached thoracic segments are more or less displaced. (Locality 61k.) U. S. National Museum, Catalogue No. 60090.
</td></tr><tr valign="top"><td></td>
<td></td>
<td>10. (× 2.) Small, nearly entire, undistorted dorsal shield with large third thoracic segment. (Locality 61k.) U. S. National Museum, Catalogue No. 60091.
</td></tr></tbody></table>
The specimens represented by figs. 2-10 are from locality 61k. Lower Cambrian: Mahto formation; dark, hard siliceous shale, northeast base of Mumm Peak above Mural Glacier on the west side of Hitka Pass, 6 miles (9.6 km.) in a direct line north of summit of Robson Peak and northwest of Yellowhead Pass, in western Alberta, Canada.</div>
<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>
1913/14
<p>Charles D. Walcott: <i>Cambrian Geology and Paleontology II</i>. Smithsonian Miscellaneous Collections Volume 57 (Publication 2270). City of Washington. Published by the Smithsonian Institution. 1914. Inlcuding:
</p>
<dl><dd>Charles D. Walcott: <i>New Lower Cambrian Subfauna</i>. Smithsonian Miscellaneous Collections Volume 57, Number 11 (Publication 2185). City of Washington. Published by the Smithsonian Institution. July 21, 1913</dd></dl>