The polyp lived on top of a tabula in a depression in the top of the coral called the calyx .
In unstalked crinoids, the cirri are located on the end of the calyx opposite the mouth, and are used by the animal to grasp the substratum.
In most extant crinoids, primarily the shallow-water ones, there are two body regions, the calyx and the rays.
The characters that make this species distinct from the members of the C. sampsoni clade are primarily the thin-plated calyx and basal plates, which are higher than wide.
You seem to be having a stone in the lower calyx of the right kidney.
The pattern of proximal axes being more aborally inclined than are distal axes is similar to that in C axes of crinoid calyx plates.
The flower has a tubular calyx with four ovate lobes and a corolla with four overlapping petals.
The base and sides are surrounded by cortical tissue, and the apex protrudes into the renal calyces .
The real attraction, though, is the dramatic calyxes that remain after the small flower petals fall.
He gave special attention to the pubescence of the leaves and of the calyces .