I know of no form in which so many of the characteristic features of a typical hydroid are more finely expressed than in this beautiful species.
"On the Origin and Metamorphoses of Insects"
Sir John Lubbock
See also Hincks, British hydroid Zoophytes.
"On the Origin and Metamorphoses of Insects"
Sir John Lubbock
Huxley examined a large number of these, and picked out from them two great families of polyps, the hydroid and Sertularian polyps, which each consist of colonies of creatures very much like the little fresh-water hydra.
"Thomas Henry Huxley; A Sketch Of His Life And Work"
P. Chalmers Mitchell