31. Various crinoid fossils hint at possible prehistoric predators. 32. Overlying this is 5 to 6 m of fragmental calcarenite containing abundant crinoid columnals. 33. Crinoid arms grew out of the crinoid ball.34. Crinoid arms grew out of the crinoid ball. 35. The Silurian fauna of Tennessee included brachiopods, bryozoans, crinoids , and gastropods. 36. He specialized in echinoderms, particularly sea stars, sea urchins, and crinoids . 37. The majority of living crinoids are free-swimming and have only a vestigial stalk. 38. The crinoid nervous system is divided into three parts, with numerous connections between them. 39. These extinct groups can exceed the crinoids in both numbers and variety in certain strata. 40. Crinoids are a kind of St Cuthbert.
