Wow. This is a lot of pictures. Brace yourself.
I was thinking about steampunk, and I thought I would like to make a bustle. So I started researching. These are the 1870s bustles I found (tomorrow you can see the 1880s!). I have lumped them into three categories. First, the boring, like hoops but a little funny shaped, bustles. Second, there are the mummy hoops (I have included pictures from both side and front for these, so you can see what I am talking about), where there are wire supports only in the back and then a grid of tapes for support. I have made up the mummy term, but that's just what it makes me think of. Then there are the more interesting bustles, which vary and are often fabric with casings for wires or even without wires altogether. Interesting. I must further consider what I want to make for myself. If nothing else, I'm enjoying seeing the variation.
First category: Boring hoop-like things.
Second category: The mummy bustle
Third category: Interesting bustles, usually with casings.