FIGURE 4 in Crinoids of the stalked family Hyocrinidae (Echinodermata) collected by the USNS Eltanin in the Southern Ocean

FIGURE 4. Theca and proximal arms in Feracrinus heinzelleri. A–C: specimen USNM1126892-1; D–E, G: USNM 1126896 specimen 1; F, H: USNM 1126896 specimen 2. A: general view, ray A removed; B: same view, oral cone; C: anal sac, ray C removed; D: side anterior view (A ray at center); E,G: side view with D–E interray at center (arms D and E removed); F: side view with D ray at center; H: tegmen (close up of E); a: anus, as: anal sac, hy: hydropores, o: oral, oc: oral cone, rb: articulation between radial and Br1or hole corresponding to radial/arm articulation, tg: tegminal plates.