The pentacrinites, the lowest of the echinoderms, have only one living representative in tropical America, where we find at the same time the highest and largest spatangi and holothuridae.
"Louis Agassiz: His Life and Correspondence"
Louis Agassiz
Termed also trepang, sea cucumber, sea slug, cotton spinner, and known scientifically as holothuridae, no less than twenty varieties have been described and are identified by popular and technical titles.
"The Confessions of a Beachcomber"
E J Banfield