 For many years only one fossil Nectocaris was known , poorly preserved and without a counterpart . This fossil was a puzzle , as its head looked rather like that of an arthropod but its body , with what seemed to be fins along its back and belly , looked rather like of a chordate 's . In 2010 Smith and Caron described another 91 specimens , some very good , and reconstructed it as a cephalopod , and the earliest one as of 2010 . Unlike later cephalopods it had only two arms , and its eyes seem mounted on stalks . But it had a soft funnel , similar to the ones used for propulsion by modern cephalopods . 
