Illustration of the lateral view of a feather star (Ptilocrinus pinnatus) by Violet Dandridge published in “A Monograph of the Existing Crinoids” by Austin Hobart Clark in 1915.
https://files.mastodon.social/media_attachments/files/113/283/111/012/497/495/original/12a29c29c1aa1cd9.jpg