<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>E.D. Cope</dc:creator>
  <dc:date>1878</dc:date>
  <dc:description>&lt;p&gt;This, with the genus following, introduces for the first time into the North American extinct fauna the family of the Dercetiform fishes. The relationship of the family has been discussed by various authors, especially by Pictet and Von der Marek. The former regards them as &lt;i&gt;Teleostei&lt;/i&gt;; the latter as "Ganoids". As I do not adopt the division signified by the last name, I find Professor Pictet's view nearer to the point. The specimens indicate further that the &lt;i&gt;Dercetidae&lt;/i&gt; belong to the &lt;i&gt;Actinopteri&lt;/i&gt;, and probably to the order &lt;i&gt;Hemibranchii&lt;/i&gt;. The only alternative is the order &lt;i&gt;Isospondyli&lt;/i&gt;, and the characters which separate the two are not clearly shown in the specimens. Distinct bones below the pectoral fins may be interclavicles, which belong to the &lt;i&gt;Hemibranchii&lt;/i&gt;.&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.3133/70159089</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Government Printing Office</dc:publisher>
  <dc:title>Descriptions of fishes from the cretaceous and tertiary deposits west of the Mississippi River</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>