Naught; Nautilus + 

The Argo‑naut or Nautilus, + 

With habits quite adventurous, + 

A com‑bin‑a‑tion of a snail, + 

A jelly‑fish and paper sail. + 

The parts of him that did not jell, + 

Are packed securely in his shell. + 

It is not strange that when I sought + 

To find his double, I found Naught. + 