Cystoidea (CYSTID I A)

Fo il Echinoderms, allied to the Crinoids. They have globular bodies, inclosed by plates, some d IMG:content-1074.png:[blocks in formation] A, Caryocrinus ornatus : a, Column; b, Calyx; c, Scars where pinnulse were attached; d. Valvular pyramid. B, Pleurocystites squamosus (dorsal side): p . p , Two of the pectinnated rhombs. C, Pseudocrinus bifasci- at us . D. Lepadocrinus Gebhardi. of which are porous. The arms are rudimentary, and reproductive bodies are in the calyx. They are stalked or se ile.