Hi Sylvia,
I assume you are asking about the argonaut or "paper nautilus", since the
true Nautilus never leaves its shell while alive.  Pictures of many kinds of
cephalopods can be found at the following website.  I'm not sure if an
argonaut without the shell is shown there or not.

http://www.soest.hawaii.edu/tree/cephalopoda/cephalopoda.html

If you are looking for the paper nautilus on this site, just keep in mind
that it is not actually a Nautilus, and will not be found in that section.
It is actually an octopus.  So go to the octopoda section, and then find the
family Argonautidae.

Regards,
Paul M.