The compressed form and diminutive size of certain caudal vertebrae indicate so much analogy with hydrus as to induce Professor Owen to pronounce this extinct ophidian to have been marine.
"The Student's Elements of Geology"
Sir Charles Lyell
The species figured in the accompanying drawing is the Hydrophis subloevis of Gray; or hydrus cyanocinctus of Boie.
"Sketches of the Natural History of Ceylon"
J. Emerson Tennent
3. hydrus colubrinus, Schlegel Phys.
"Journals Of Two Expeditions Of Discovery In North-West And Western Australia, Vol. 2 (of 2)"
George Grey