The number of the species of holothuria, and of the individuals which swarm on every part of these coral-reefs, is extraordinarily great; and many shiploads are annually freighted, as is well-known, for China with the trepang, which is a species of this genus.
"Coral-Reefs"
Darwin, Charles
Two more belong to the species Thyone; and the seventh kind of holothuria ought, properly speaking, to form a class apart, not having tubular feet, but adhering, by means of their sharp skin, to extraneous objects, on which account they might be called Sinapta; their feelers are fringed and they live concealed among stones.
"A New Voyage Round the World, in the years 1823, 24, 25, and 26, Vol. 2"
Otto von Kotzebue
Six holothuria, belonging to three different species, were observed: a large Thalassema gave us a long-wished for opportunity of observing, that this species belongs to the holothuria, and not to the Annulides.
"A New Voyage Round the World, in the years 1823, 24, 25, and 26, Vol. 2"
Otto von Kotzebue