More brachiopods! The spiral lophophores are a filtering apparatus.
Image 1: Brachiopod, (image source)
Image 2: Magellania, an articulate brachiopod (source)
Image 3: Group of brachiopods. (Source). The coolest one is “E”:
Notosaria nigricans E. Brachial interior with spirolophous lophophore
Sounds like we have a word (or phrase) of the day!
Monocot root cross-section
“The vast majority of these illustration plates are from a plant systematics wall chart series – the Dodel-Port Atlas – released between 1878 & 1883”