In cases where you want many bones drawn in a clearly defined shape, you
can use the 
Bones from Curve tool. You
can assign as many bones as you need and the tool will evenly space and
position them along an existing path curve.
You can also use this tool to set up a “follow curve” solution so you can use the path curve as a manipulator for the bone chain.
Note
Manipulating the original curve will alter the shape of the bones.
For more information see the Bones from Curve help.