Figure 8. Iocrinus trentonensis Walcott, 1883 and Cremacrinus guttenbergensis Kolata, 1975: (1–3) Iocrinus trentonensis;(1) two partial specimens (note arm branching on the larger specimen and aboral cup shape on the smaller specimen), UMMP 74667.1–74667.2; (2) CD interray view of partial crown illustrating the compound radial plate in the C ray (compare to Figure 5.2), UMMP 74668.1; (3) isolated anal sac with the typical Iocrinus anal sac morphology, UMMP 74668.2; (4–5) E-ray view of a nearly compete specimen of Cremacrinus guttenbergensis, UMMP 74664; (4) note complete (if partially disarticulated) column and encrusting holdfast, first few brachials of E ray damaged prior to collection; (5) enlargement of aboral cup, note pitted plate sculpture. Scale bars=2.5mm (5); 5mm (remaining).