Answer:
What has two spines and a lot of ribs, and carries much but never moves?
An open ended barrel, it is shaped like a hive. It is filled with the flesh, and the flesh is alive!
My first is in window but not in pane. My second's in road but not in lane. My third is in oval but not in round. My fourth is in hearing but not in sound. My whole is known as a sign of peace. And from noah's ark won quick release.
What I am filled, I can point the way. When I am empty. Nothing moves me. I have two skins. One without and one within.
Gold in a leather bag, swinging on a tree, money after honey in its time. Ills of a scurvy crew cured by the sea, reason in its season but no rhyme.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.