DR. HUBERT LYMAN CLARK‘S large work, "Echinoderms from Australia", was reviewed in Nature of September 24, 1938. That review and the obituary notice of Dr. Clark in Nature of September 20 ...

Echinoderms: A phylum of marine animals characterized by their radial symmetry and a water vascular system, including starfish, sea urchins, and sea cucumbers. Regeneration: The process by which ...

The diversity and abundance of echinoderm fossils is reflected in the Museum's large, world-class collection. Fossil echinoderms are numerous, due in part to the fantastic preservation potential of ...

Echinoderms are found in ocean ecosystems worldwide, from rocky shores to the deep sea. Animals in this phylum are characterized by radial symmetry as adults, with body parts that repeat around an ...

Like all echinoderms, echinoids have a skeleton composed of calcitic plates embedded in ... In regular echinoids the test is globular and perfectly pentaradiate, but in irregular echinoids there is a ...