Send a comment on this item to LII: Send a comment on this item to LII staff, who on weekdays will usually reply within 24 hours. The Echinoid Directory Learn about how sea urchins, or echinoids, live, feed, and reproduce. The site features a morphology of the sea urchin skeleton, a key to the families and genera, and a listing of the taxonomic groups. Though some sections are written for the "casual visitor with no biological training," the main purpose of the site is "to provide a taxonomic resource for the scientific community." From the Natural History Museum, London. http://www.nhm.ac.uk/research-curation/research/projects/echinoid-directory/ Asterisk * indicates required field. Your Name Your Email Address * We will not sell or provide your email address to anyone else. Comment * Enter the verification code as it is shown in the box below. This helps prevent automated submissions. *