I purchased this next specimen from Ebay. It's a Caryocrinites ornatus Cystoid from the Rochester Shale. It is in pretty good shape but could use a little cleaning to bring out some more detail.
This would be the top of the calyx where the arms would have attached.
A slightly different angle of the above view.
The specimen came from the Rochester Shale which is dated to the
Sheinwoodian/Homerian stage of the Wenlock epoch of the Silurian.
Here are some specimens from the Yale Peabody Museum of Natural History.
My friend Joe has a very nice intact specimen on his website.