from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of the family Janthinidae of violet snails.
from the GNU version of the Collaborative International Dictionary of English
- n. Any gastropod of the genus Ianthina, of which various species are found living in mid ocean; -- called also purple shell, and violet snail.
from The Century Dictionary and Cyclopedia
- n. The representative genus of the family Ianthinidæ; the oceanic violet-snails.
- n. [lowercase] A violet-snail.
Crystal cones form the shells of pteropods or winged snails hat drift downward from the surface to these dim regions by day; and the translucent spires of lovely ianthina are tinged with Tyrian purple.
This colour was also procured from a species of shell-fish, the chelzon of the Hebrews, and the Helix ianthina of modern naturalists.
_Murex trunculus_; the _Murex brandaris_; and the _Helix ianthina_.
The _Helix ianthina_ has a wholly different character.