the latin name (kingdon? geneis? species? --one of those-- unless its one i left out) has octopus as belonging to the cephlapod family.. (cephla=head, pod=foot)

knowing as much as we now know about octopuses, i would think calling their appendages fingers would be almost as good a word to use as foot.. (a cephladigi or something of that sort. it's a thought.)